Pre-Synchron 300T Pro Restoration
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  1. #1
    Member Formula1980's Avatar
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    Pre-Synchron 300T Pro Restoration

    I found this Pro at an NAWCC event in Del Mar last October. It looked pretty rough. The second hand was missing and there was a pretty bad gouge on the crown side. The crystal was original, but had some deep scratches that had me thinking twice. In the end, I just felt sorry for this little orange guy. I really was on the hunt for another Sharkhunter, they are my favs, but I couldn't say no to an affordable project piece.

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    Sorry...lost the battle with flipping and uploading.

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    I mentioned earlier that the crystal was an item of contention. I remember someone mentioning cerium oxide to polish glass crystals sometime back, so I figured I'd give it a try. It was messy business. A dremel/rotary tool spinning at 15,000 rpm while you drip a pink milky substance on the crystal was an experience to say the least. It worked, though.

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    I cleaned and relumed the dial and hands. I had a spare second hand from the set I bought from Squale to fix my Aubry 600T. The repair guy said he could make the hand fit even if it was too big. It's white, but I thought to leave it as such as a reminder of what was added/replaced.

    The bezel was tough to clean up. It was pretty rough. I did the best I could without polishing the No-Deco stamping to oblivion. I relumed the bezel too.

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    I filed down some 750T endlinks to 20mm. They mate the spare bracelet to the case, but they don't stay against the case as well as I hoped. They swing to and fro too much. So I'm on the hunt for 600T endlinks. The bracelet is the older non-individual rice bead that came on the 600Ts a decade or so ago. This combo worked nicely with my Synchron Sharkhunter. For now, I've got it on a tropic strap.

    This old orange dog is keeping wonderful time. It was a more difficult process than I thought it would be. For example, the crown was a royal pain to find. I didn't think finding one to fit the tube was going to be such a quest. It's a good thing I'm patient.

    Cheers!

    Omar Montaño

    Auricoste Spirotechnique
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  2. #2
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    Re: Pre-Synchron 300T Pro Restoration

    Whoa. Looks amazing, nice work!!

  3. #3
    Member Paul Ramon's Avatar
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    Re: Pre-Synchron 300T Pro Restoration

    Great job Omar! Looks like a 69, really cool you gave it new life for its 50th birthday, well done.

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  5. #4
    Member Formula1980's Avatar
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    Re: Pre-Synchron 300T Pro Restoration

    Quote Originally Posted by Paul Ramon View Post
    Great job Omar! Looks like a 69, really cool you gave it new life for its 50th birthday, well done.
    Thanks guys! You know, I was so focused on the manual labor I put into the cosmetics that the 50th birthday hadn't occurred to me.

    These pre-Synchrons are definitely different than the Synchron models. The bezel was a extremely difficult to put back on the case. Everything that was easy with my Synchron was not so with this '69. It didn't help that this one was a "diamond in the rough". I spent a lot of time filing the blemishes of the case before taking the rotary tool to polish before sating finishing by hand.

    Aside from the crown being a challenge, the end links are proving to be annoying too. In 2013, I bought what was said to be a 600T bracelet with end links from a member. It all fit my Synchron Sharkhunter no problem. I mentioned that I filed down 750T end links to 20mm. Last night, I did the swap, I put the former/modified 750Ts ends to my Synchron Sharkhunter, and they worked. They have a little play, but not bad. I thought for sure what I'd been using on the Sharkhunter before would be a sweet match to the Pro. It worked better, but still there's play. Less, but enough to be annoying. The case thickness and lug depth really make for a huge difference in trying to mate modern bracelets/equipment to the case. I spoke to Doxa about selling me end links. They no longer have 600T ends, but said 1200T ends would work. They have yet to send me an invoice after saying I'd take a pair. But with my swap experiment, I'm beginning to think that 1200T ends will work on a Synchron case, but not so much on this one. If anyone has advice and wisdom on the matter....I sure could use a lesson!
    Paul Ramon likes this.
    Omar Montaño

    Auricoste Spirotechnique
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    "The best way to observe a fish is to become a fish" - Jacques-Yves Cousteau

  6. #5
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    Re: Pre-Synchron 300T Pro Restoration

    Great job. I should have you fix my searambler up;)


    Sent from my iPhone using Tapatalk

  7. #6
    Member Formula1980's Avatar
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    Re: Pre-Synchron 300T Pro Restoration

    Quote Originally Posted by nitron135 View Post
    Whoa. Looks amazing, nice work!!
    Always appreciate the kind words. Thought I'd share the new setup. Think I might keep this on this Tropic strap and forget about a bracelet.

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    Omar Montaño

    Auricoste Spirotechnique
    Auricoste Nouvelle Spirotechnique
    Blancpain Aqua Lung No Radiations
    Doxa Sub 300 Professional Black Lung Reissue
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    Doxa Sub 300T Sharkhunter US Divers
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    Doxa Sub 300T Divingstar Poseidon Reissue
    Doxa Sub 600T Professional Spirotechnique
    Doxa Sub 1200T Sharkhunter
    Doxa Sub Mission 31
    IWC Aquatimer 2000 Ref. 3568
    IWC Aquatimer 2000 Ref. 3538
    IWC Aquatimer Chronograph Ref. 3719
    IWC Aquatimer Chronograph Cousteau Ref. 3767
    Jenny Caribbean 300 Black/Yellow
    Jenny Caribbean 300 Blue/White
    Tudor Submariner 94110

    "The best way to observe a fish is to become a fish" - Jacques-Yves Cousteau

  8. #7
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    Re: Pre-Synchron 300T Pro Restoration

    Great job in keeping another Doxa alive.

    Bravo.

  9. #8
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    Re: Pre-Synchron 300T Pro Restoration

    Mind sharing what that strap is?

  10. #9
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    Re: Pre-Synchron 300T Pro Restoration

    Quote Originally Posted by nitron135 View Post
    Mind sharing what that strap is?
    Check out cheapestnatostraps.com - it's "dirty orange". It's a great replica of the old Tropic Swiss straps of yesteryear. Thick, soft, comfy silicone rubber.

    I found mine on Ebay. It came with two NATOs. Many of the old school Tropic straps seem to have been resurrected!
    nitron135 and Paul Ramon like this.
    Omar Montaño

    Auricoste Spirotechnique
    Auricoste Nouvelle Spirotechnique
    Blancpain Aqua Lung No Radiations
    Doxa Sub 300 Professional Black Lung Reissue
    Doxa Sub 300 Sharkhunter Black Lung Reissue
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    Doxa Sub 300T Sharkhunter US Divers
    Doxa Sub 300T Sharkhunter US Divers/Synchron
    Doxa Sub 300T Divingstar Poseidon Reissue
    Doxa Sub 600T Professional Spirotechnique
    Doxa Sub 1200T Sharkhunter
    Doxa Sub Mission 31
    IWC Aquatimer 2000 Ref. 3568
    IWC Aquatimer 2000 Ref. 3538
    IWC Aquatimer Chronograph Ref. 3719
    IWC Aquatimer Chronograph Cousteau Ref. 3767
    Jenny Caribbean 300 Black/Yellow
    Jenny Caribbean 300 Blue/White
    Tudor Submariner 94110

    "The best way to observe a fish is to become a fish" - Jacques-Yves Cousteau

  11. #10
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    Re: Pre-Synchron 300T Pro Restoration

    Quote Originally Posted by Formula1980 View Post
    I found this Pro at an NAWCC event in Del Mar last October. It looked pretty rough. The second hand was missing and there was a pretty bad gouge on the crown side. The crystal was original, but had some deep scratches that had me thinking twice. In the end, I just felt sorry for this little orange guy. I really was on the hunt for another Sharkhunter, they are my favs, but I couldn't say no to an affordable project piece.

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Views: 84
Size:  165.7 KB

    Name:  WP_20181019_15_05_42_Pro.jpg
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    Sorry...lost the battle with flipping and uploading.

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    Name:  WP_20181019_15_08_36_Pro.jpg
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    I mentioned earlier that the crystal was an item of contention. I remember someone mentioning cerium oxide to polish glass crystals sometime back, so I figured I'd give it a try. It was messy business. A dremel/rotary tool spinning at 15,000 rpm while you drip a pink milky substance on the crystal was an experience to say the least. It worked, though.

    Name:  WP_20181110_12_27_27_Pro.jpg
Views: 85
Size:  145.0 KB

    I cleaned and relumed the dial and hands. I had a spare second hand from the set I bought from Squale to fix my Aubry 600T. The repair guy said he could make the hand fit even if it was too big. It's white, but I thought to leave it as such as a reminder of what was added/replaced.

    The bezel was tough to clean up. It was pretty rough. I did the best I could without polishing the No-Deco stamping to oblivion. I relumed the bezel too.

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    Name:  WP_20190427_16_32_38_Pro.jpg
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    Name:  WP_20190427_16_25_17_Pro.jpg
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    I filed down some 750T endlinks to 20mm. They mate the spare bracelet to the case, but they don't stay against the case as well as I hoped. They swing to and fro too much. So I'm on the hunt for 600T endlinks. The bracelet is the older non-individual rice bead that came on the 600Ts a decade or so ago. This combo worked nicely with my Synchron Sharkhunter. For now, I've got it on a tropic strap.

    This old orange dog is keeping wonderful time. It was a more difficult process than I thought it would be. For example, the crown was a royal pain to find. I didn't think finding one to fit the tube was going to be such a quest. It's a good thing I'm patient.

    Cheers!

    Well done Omar!! back to life for the orange fella...mate where did you get your luminous paint from if i may ask please?
    All the best
    Dave
    Joe90 likes this.

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