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French Benrus Mark IV


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Need some help with this one, my neighbor gave this to me, said it was his grandpa's retirement gift from Marathon Oil co, probably in 60's?, its a FU14 14 jewel, I searched the bay for similar and found a few. This one has minor H2O intrusion, (yeah says waterproof!) batt was not leaking, but confirmed water mark, coil screw has rust, I guess my question is, is it worth fixing? Hands are loose, when you try setting they catch, second hand also winds when stem is turned. (no big deal) Overall watch is in great shape, no repair marks in caseback, have not tried batt yet, appreciate any help/info. Dig that crazy lightning bolt sweep hand!

Thanks, Dave

DSCF0196.JPGDSCF0197.JPGDSCF0198.JPGDSCF0199.JPG I would

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I  personally would like to service/repair this watch as it is a movement I have never encountered before. So for me it would be a yes it,s worth it. Parts will be a challenge but that,s part of the fun.

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3 hours ago, clockboy said:

I  personally would like to service/repair this watch as it is a movement I have never encountered before. So for me it would be a yes it,s worth it. Parts will be a challenge but that,s part of the fun.

Me too, any idea on maker? I looked on Ranff and Gleaveandco, but no luck unless I missed it, (highly possible). The rusty coil screw has me a bit worried. Thanks

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6 hours ago, Cad101 said:

Thats an impressive piece of information youve provided there syfre. I'm excited to see this project finished.

so would I,:startle: seller of parts movement has not accepted my reasonable offer,..... yet. Think they're waiting for auction to end, I'll update when I get confirmation, they said it works, so that's a plus!

Thanks again syfre, I am indebted for your info.

 

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UPDATE: Good news, seller accepted my offer and while it's an 11J model, (second generation with blue diode), it just might work for parts. Seller stated that movm't was tested and second hand advances. I translated syfre document to get all the other particulars about this truly unique movement.

Sovereign-Electronic-11J-Q-Watch-11W-1K-France-Movement

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That's excellent news, things are progressing nicely if new movement works I would probably just change parts with a name attached to them like the train bridge just to keep a hint of its originality.

Mick

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  • 2 weeks later...

UPDATE: installed new batt yesterday in parts movement, (11j) did not work as seller described, put batt in 14j movement and nothing.... back to square one, :pulling-hair-out:

as I mentioned, original watch has minor rust on movement case screw and coil screw, case screw is pretty bad, don't think I can get out without wasting it, I'll get updated pics soon and suggest Moderator move to repair forum???

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22 hours ago, Cad101 said:

I would be having serious words with that seller that's for sure and asking for at least some kind of refund.

 

yeah , fleabay generally sides with buyer on issues, I sent message to seller to let them know it didn't work, I don't expect a response,

got rusty case screw out,:woohoo-jumping-smiley-emoticon: now trying figure out retention/case ring, gently trying to separate but seriously not budging, movement will rotate easily, here is update screw pic.... pretty uglyDSCF0210.JPG

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Last chance for this one, got back on bench this a.m. before hitting finger with hammer and getting stung by honeybee on same finger working on house, (figured I'd better quit before something really bad happens)swapped out coil and blue diode, maybe newer version parts may have better chance of working???, still nothing, coils look good, no obvious nicks, but you can't tell by looking, don't really want to get into balance assembly. This might be a cut losses project, unless there is something on dial side I can't see yet that's holding up the operation, because I can't get the fargin' thing out of case! Okay I feel better now, IF and WHEN I get back to this, I will update only if successful. Thanks for all your help.DSCF0219.JPG

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    • Welcome to the group Stirky. You can search for just about every subject in the craft here. Don't be afraid to ask if you can't find the answer that may have already been covered ( some ad nauseum LOL ). You don't have to buy Bergeon to get good quality. There are many decent mid-range tools available that will last you a lifetime. Cousins would be a good place to start . Cheers from across the pond ! Randy
    • I picked up a similar amount of these jewels some years ago in a watch and clock fair. Every now and then they come in handy. This week I've got a rubbed in bombe jewel in the balance cock that is cracked and needs replacing. Very handy to have a vintage assortment of these type of jewels!
    • Great diagram with the teeth and pinion count. Simple way to reduce the speed of the hour wheel by the 12:1 minute wheel. Genius and yet so simple. Always good to reinforce the principal by what you have done in your drawing. Keep doing that. I had a drawing on my wall for years showing me this which is very similar to the drawing you have done. Here's a formula to work out the beats per hour of a watch movement. The movement's BPH is dictated by the wheel teeth and pinion count and the hairspring being vibrated to the correct BPH by finding the pinning up point on the hairspring using a vibrating tool.  The reason in the formula there is X2 on the top line is because there are two pallet stones.
    • So I just wanted to say "thank you" again.  The angle is the key bit it seems and yes, it did basically just fall, or float, back into position when I got it lined up just right. I had meant to add that now that I see how it goes in, I totally see how it came out in the first place, and that whomever cloned the original movement didn't pay much attention to the fine details around the setting or how it interfaces with the balance cock or the "rings" on the regulator and/or stud carrier arms.
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