What Makes a 7c46 a Superior Movement?
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  1. #1
    Member romeo-1's Avatar
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    What Makes a 7c46 a Superior Movement?

    Please pardon my ignorance but isn't the 7c46 just another quartz movement? Please educate me!
    Chuck Norris doesn't wear a watch...HE decides what time it is.


  2. #2
    Member speedbird119's Avatar
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    Re: What Makes a 7c46 a Superior Movement?

    I'm not an expert on it, but my brief understanding is that it is extremely reliable and very, very ruggedly built using all metal components. It is likely thermal insulated as well, all designed to handle the extremes of deep saturation diving.

    Others will know more tho...

    Best,

    Mike
    Seiko 7549-7010
    Seiko 6309-7040

  3. #3
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    Hi Romeo1...The 7C46 is much more than just another quartz movement

    As "Speedbird" has correctly mentioned, these movements are quality built movements.


    So lets dive alittle deeper into just what this 7C46 quartz movement is, and what features it possesses ...

    First of all,
    The term "Prospex" translated into English terms means (Professional Specifications), and the 7C46 quartz machine is only found and used in the SEIKO Professional Series Quartz Dive watches, namely the Tuna series and the prior Professional Ashtray models.

    They the 7C46 movement & the Tuna series cases, were built with a specific purpose and intent in there specifications and ultimate design; and that was to be the best professional tool divers watch made! (So nothing was spared or held back in there design or quality of manufacture)

    As we know, "Seiko" actually is the original father of this realized quartz watch technology that actually came out of the real world commercial diving industry as a answer to having a divers watch that could handle the rigors of deep depth.
    Thus, they were designed with no cuts in quality or cost saving materials at all; but rather have advanced scientifically developed components and material in there make up.

    The 7C46 is a (Hi-Tech) multi jeweled movement with extreamly "Hi-Torque tollerances and High efficiency" built in over prior 7 series quartz movements, which enable the 7-jeweled geartrain and pinions to motion & turn the hands in perfect sync to the energy-pulse, with much less kinetic effort via the electronic step motors that power them.
    Thus making for a highly accurate and efficient full size quartz machine to perform strongly with much less resistence.



    They also incorporate (dual-rate trimmers) which allow the watch to be perfectly synchronized for extream accuracy, which aid in the longevity and add to there lifespan, while running well with in the stated accuracy specs.

    They also enjoy the added benifits of, Low-Drain electronics while providing High-Torque Power to the gear driven train and Oversized Hands for optimal efficiency & extended battery life. As an added plus, this caliber also incorporates the E.O.L. (End Of Life) Low battery warning feature, of the seconds hand ticking at 2 second intervals when the battery voltage is low, thus alerting the owner its time to replace the battery cell.

    They also provide the Premium Benefits of being designed in a full expanded size, and are incorprated into the advanced Titanium alloy cases that house them, which are also very highly advanced designs on there own rite built with advanced shock protection built-in specifically for this movement.

    The cases also provide "Enhanced antimagnetic Gauss's law & thermal compensational technology, as well as full Helium/Nitrogen gas Prevention & Dispersional technology.

    They simply are just the perfect combination of the utmost in quality craftsmanship, to enable them to easily handle the various extream conditions of Commercial diving found around the globe, in any oceanic environment.

    They also can be completely diassembled for cleaning & service many years down the road; that together with the other quality design features therefore make this movement, the absolute highest quality advanced Professional quartz divers watch movement in the world AFAIC.

    These highly evolved movements, as well as the Tuna series Professional Dive watch cases & components, probably hold more advanced (patent designs) than any other watch in the world!


    Well I gave my thoughts and some facts about these movements, and I hope it helps you to understand just how much quality & technology goes into the 7C46 movement...

    Cheers,
    Jimmy
    Last edited by Poseidon-Jim; June 2nd, 2011 at 05:54.

  4. #4
    Member romeo-1's Avatar
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    Re: What Makes a 7c46 a Superior Movement?

    Great! Thanks for the informative answers guys! I feel really good about my new SBBN015!
    Chuck Norris doesn't wear a watch...HE decides what time it is.


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    Re: What Makes a 7c46 a Superior Movement?

    Great post Jim, I enjoyed the read thoroughly. Love the tuna's, nice to know why I love them so much and more so now. ;)

    Cheers, Dave.

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    Thanks Dave, it's actually a great honor that the Tuna family

    houses such a quality specialized movement such as the 7C46!

    I agree that it makes owning the Tuna that much more interesting and special to it's owner, considering both are only found with-in each other, in what I and many others like you feel is the absolute highest quality Professional working tool Diver available IMHO.

    Thanks Dave & Dive watches Rule!

    Jimmy










    Quote Originally Posted by sharkfin View Post
    Great post Jim, I enjoyed the read thoroughly. Love the tuna's, nice to know why I love them so much and more so now. ;)

    Cheers, Dave.

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    Re: Hi Romeo1...The 7C46 is much more than just another quartz movement

    Geez Jimmy - where do you get this stuff? You're a legend mate!
    brett kenny likes this.

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    lol, well thanks Jason_recliner!...When it comes to Tuna, I get very hungry

    and it's just that I really get into these watches and the movements that power them.

    I appreciate the thoughts mate, and you guys are just a great group of forumers that I've been fortunate enough to be associated with, so many thanks!

    Regards & hope the summer comes soon in your neck of the woods-

    Jimmy



    Quote Originally Posted by jason_recliner View Post
    Geez Jimmy - where do you get this stuff? You're a legend mate!
    brett kenny likes this.

  9. #9
    Member GlennSim's Avatar
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    Re: lol, well thanks Jason_recliner!...When it comes to Tuna, I get very hungry

    Just look at how well these 7C46 movements will hold time within specifications ,even after decades of usage...that's the proof it aint just any quartz..

    some of my old seiko ordinary movement quartz have long kaput...but the tunas(7C46) remains solid and sharp on time.
    "Life is peanuts"

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    I totally agree GlennSim, they are as accurate as any watch going IMO

    My SBDS018 1000m Golden SQ Tuna, and my other SSBS018 Golden Tuna kept as good time as less than -1 to -1.25 seconds in 90 days if my checks were correct...I'm sure they both may have gained & lost fractional time but then self adjusted and were well with in cosec or better yet, atomic clock time.
    Granted, they were both fairly NOS but the batteries were on 4 years of age and still kept exacting accuracy & time.
    (I think the consistency of -1 to -1.25 shows the movement was right on the money, and probably only needed a tweak on the rate trimmers to the positive gain just a click or so)

    I'm sure (Romeo1) now has enough info, to form a very good take on these 7C46 movements now, and that they will stand the test of time!

    Regards,
    Jim





    Quote Originally Posted by GlennSim View Post
    Just look at how well these 7C46 movements will hold time within specifications ,even after decades of usage...that's the proof it aint just any quartz..

    some of my old seiko ordinary movement quartz have long kaput...but the tunas(7C46) remains solid and sharp on time.
    Last edited by Poseidon-Jim; August 24th, 2010 at 03:46.

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