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  1. #21
    Member pinkybrain's Avatar
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    Re: SLA017 (SBDX019) The 62MAS Re-Issue: A Pictorial

    Someone in the main thread removed the caseback and posted a picture, and it does indeed look like the latter, decorated version (8L35B).

    Quote Originally Posted by obomomomo View Post
    I suppose I've been lucky with my SLA017 at around +3.25spd, whereas my SBDX017 MM300 is around +7.5spd which I consider still quite acceptable.

    One thing I've found is that the 8L35B in my MM is extremely consistent and hardly varies with position so cannot be 'regulated' overnight like some of Seiko's lesser movements. My MM300 has maintained almost exactly the same rate, slowing 0.5spd (at most!) from day one and didn't 'settle down' to get any slower like the 6R15 watches normally do in the first weeks. My SLA is still too new to tell but accuracy has also slowed around 0.5spd in the first 48 hours since I got it about 10 days ago so it might be a bit optimistic to hope that it will slow any more significantly in the coming weeks.

    The 8L35 is now 8L35B first used in the SBDX017, signifying use of new MEMs technology in the balance wheel, pallet fork and escape wheel. and it's also supposed to be a decorated movement compared to the previous-gen 8L35A (I haven't opened up the caseback to check but this is what I understand).

    I'm not sure whether those qualify as 'major modification' or not.


    MEMs technology, new (top) vs. old pallet fork and escape wheel
    Attachment 12354135

    8L35A (older) undecorated movement
    Attachment 12354137


    8L35B (newer) decorated movement with MEMs
    Attachment 12354139

  2. #22
    Member pinkybrain's Avatar
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    Re: SLA017 (SBDX019) The 62MAS Re-Issue: A Pictorial

    Looks like photoshoped serial numbers to me, but I'll leave it to the OP to confirm.

    Quote Originally Posted by Watch19 View Post
    Nice writeup and close up shots. How'ed you manage to get Serial Number 0000?
    Travelller likes this.

  3. #23
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    Re: SLA017 (SBDX019) The 62MAS Re-Issue: A Pictorial

    OFF-TOPIC (... sort of)

    Quote Originally Posted by obomomomo View Post
    Superb pictures and excellent write-up, but it's misleading to say that the first dive computor was made by Seiko in 1990. They were invented much earlier in the 50's but were unreliable and expensive. Technology improved in the 70's and companies specialising in dive equipment like Orca, Dacor, Uwatec and Suunto, U.S. Divers and Tabata/TUSA started making them available reasonably priced for recreational diving by the mid to late 80's when they were the big thing for divers to have. Suunto is still one of the leading manufacturers and the only one I can think of that makes digital adventure type watches as well as dive computors. AFAIK they started first with dive computors before later making watches.
    Thanks for the compliment

    My only goal with the sentence:
    "There's also little doubt that the Quartz giant played a definitive role in the dive-computer era, including the first Dive computer in 1990."

    Was to make clear to all that Seiko's participation in Professional diving instruments was not limited to watches (complications) and thanks to their quartz-era innovations it was a clear move for them to turn to dive computers. While I investigated the Wiki on Dive Computers and came to the conclusion that Seiko's no longer a leader in this market, I simply accepted their own statement regarding the first Dive computer. Perhaps I should have quoted them to avoid wording issues (and used "The world's first computerized diver's watch").

    But thank you, all the same - as a "former" certified Open-Water PADI member*, I appreciated the info
    *let's just say that I earned it during the days where the average (poor-man) diver had a watch, depth (& pressure) gauge and decompression table stuffed in our manually-inflatable-only BCs...
    Last edited by Travelller; July 17th, 2017 at 22:35.
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  5. #24
    Member Travelller's Avatar
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    Re: SLA017 (SBDX019) The 62MAS Re-Issue: A Pictorial

    Quote Originally Posted by obomomomo View Post
    I suppose I've been lucky with my SLA017 at around +3.25spd, whereas my SBDX017 MM300 is around +7.5spd which I consider still quite acceptable. One thing I've found is that the 8L35B in my MM is extremely consistent and hardly varies with position so cannot be 'regulated' overnight like some of Seiko's lesser movements. ... The 8L35 is now 8L35B first used in the SBDX017, signifying use of new MEMs technology in the balance wheel, pallet fork and escape wheel. and it's also supposed to be a decorated movement compared to the previous-gen 8L35A (I haven't opened up the caseback to check but this is what I understand). I'm not sure whether those qualify as 'major modification' or not.

    MEMs technology, new (top) vs. old pallet fork and escape wheel
    Attachment 12354135

    ...

    8L35B (newer) decorated movement with MEMs
    Attachment 12354139
    Thank you for the info I also read about Grand Seiko's "Micro Electro Mechanical Systems" (MEMS) and I unfortunately neglected to include it my post (thb, I forgot that they also incorporated this in the upgraded 8L series).

    "Micro-Electro-Mechanical Systems (MEMS) technology is used to fabricate precision parts for Caliber 9S"

    Lucky for us all, this is a community of dedicated WIS and what one forgets, the other will follow through with

  6. #25
    Member Travelller's Avatar
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    Re: SLA017 (SBDX019) The 62MAS Re-Issue: A Pictorial

    Quote Originally Posted by hantms View Post
    ...On accuracy though.. especially given it's assembled by the GS peeps, couldn't someone take a little extra time to get it roughly to GS/COSC specs.. No need for the whole testing & certification circus, but a dude with a screwdriver and an 8L movement should really be getting closer than +10. I mean my SKX007 managed that.
    Thanks for the fist-bump

    Yeah... I'd have to side with you here, given the price and "small" production-quantity of this piece. I don't think we could demand higher accuracy from say, the MM300 line - given the fact that it's a production reference and goes for what, €1K less? But at the end of the day, my Rolex and my Omega are also running fast (but in their case, it might just be a question of a visit to the watchmaker to have them demagnetized...).

    ~~~

    Quote Originally Posted by kevinkar View Post
    ...I disagree with your statement "Steinhart's - for all intent and purposes, identical" as that is missing the release buttons which is definitely different and thus not "identical"...
    Quote Originally Posted by Molle View Post
    Great write up! Though I think the bracelet of the SLA017 is not that bad and a much better one than the Steinhart one you show.
    Well, maybe I was too harsh on Seiko's bracelet and it could be all the bracelet-bashing going on just a few threads above One one hand, Kevinkar is correct to point out the extra functionality of Seiko's release buttons but I have to be honest, I really appreciate the screws in Steinhart's. I have some rudimentary strap / bracelet tools but still manage to mess up and slotting a screw w/screwdriver is (almost) child's play. Both are double-lock systems and weight-wise, the Seiko comes in at 85g and the Steinhart's 20g heavier.

    What I honestly didn't account for is the fact that Seiko's comes with a tool-less extension mechanism ("Diver's extension") and this is a significant addition over Steinhart's and so I humbly stand corrected, enough so that my OP warrants editing!

    The hinge of the extension piece is clearly visible on the bottom-right side...
    Last edited by Travelller; July 17th, 2017 at 23:54.
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  7. #26
    Member Alpineboy's Avatar
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    Re: SLA017 (SBDX019) The 62MAS Re-Issue: A Pictorial

    Nice writeup and pictures!
    Travelller likes this.

  8. #27
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    Re: SLA017 (SBDX019) The 62MAS Re-Issue: A Pictorial

    Quote Originally Posted by Watch19 View Post
    Nice writeup and close up shots. How'ed you manage to get Serial Number 0000?
    Look close, the last 3 0's are copies of the first....they are not radial. Photoshop or similar me thinks.
    Travelller likes this.

  9. #28
    Member Travelller's Avatar
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    Re: SLA017 (SBDX019) The 62MAS Re-Issue: A Pictorial

    Quote Originally Posted by Travelller View Post
    ...What I honestly didn't account for is the fact that Seiko's comes with a tool-less extension mechanism ("Diver's extension") and this is a significant addition over Steinhart's...
    FWIW, I took some quick&dirty pics of the OEM bracelet in "extended" mode



  10. #29
    Member Travelller's Avatar
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    Re: SLA017 (SBDX019) The 62MAS Re-Issue: A Pictorial

    This one looks so awesome from just about every angle...

  11. #30
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    Re: SLA017 (SBDX019) The 62MAS Re-Issue: A Pictorial

    Thank you for the write up and stunning photos, greatly appreciated!
    Travelller likes this.

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