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Movement Identification - Bovet

mcoulton

By mcoulton
in Watch Repairs Help & Advice

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mcoulton Watch Enthusiast

mcoulton

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Posted

Hello

Does someone know what type of movement this is? It can out of a Bovet military watch but I don't think its a Valjoux or a Landeron. I haven't taken the dial off and looked on the other side of the movement.

Thanks in advance for any help that can be provided.

Michael

 

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oldhippy Distinguished Member

oldhippy

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18 minutes ago, rogart63 said:

But i see a Incabloc spring. So must be shockproof . Never seen a FHF 70 with center second attachment? 

 Where?

 

19 minutes ago, rogart63 said:

But i see a Incabloc spring. So must be shockproof . Never seen a FHF 70 with center second attachment? 

 

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Nucejoe Distinguished Member

Nucejoe

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1 hour ago, rogart63 said:

But i see a Incabloc spring. So must be shockproof . Never seen a FHF 70 with center second attachment? 

Many variants to fhf70 with different bridge layout were made, namely inderctly driven min hand, then this with center second cock and your regular sweep second with min wheel incorporated inside ebauche. 

Its ancestor fhf30 and on, were mostly sub second versions.

Almost every manufacturer put some versions in their watches,  some were in-house and high grades , Rolex did too. 

 

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mcoulton Watch Enthusiast

mcoulton

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Thanks to everyone for their responses. You've been a big help. Here are two more pictures of the time piece I'll be servicing. The crystal more than likely will need replacing as will the stem. I can't put any power into the movement as the click won't sweep fully to allow the crown wheel to turn.

Questions:  1.) Does my watch come with a seconds hand? I'm not sure if it does or if it uses a sub seconds which the dial doesn't accommodate.

2.) Are all seconds hands sized the same? I don't mean the length, I mean the pinion that they are secured to on the fourth wheel (?), is it the same for all seconds hands? Hope that makes sense.

3.) I'm thinking of buying an assortment of ETA watch stems, will I find a stem that fits this movement or do I need to search for a fhf70 movement specific stem. 

4.) What is the best parts source for this movement; Cousins, Gleaves London? 

Thanks in advance for any help that can be provided.

Michael

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Marc Distinguished Member

Marc

Posted
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11 minutes ago, mcoulton said:

1.) Does my watch come with a seconds hand? I'm not sure if it does or if it uses a sub seconds which the dial doesn't accommodate.

There appears to be a seconds hand pinion in the middle of the minute hand hub, and the movement shows a cock and tension spring for a center seconds pinion.

 

11 minutes ago, mcoulton said:

2.) Are all seconds hands sized the same?

No. You can measure the end of the pinion with a micrometer to determine the correct size.

17 minutes ago, mcoulton said:

3.) I'm thinking of buying an assortment of ETA watch stems, will I find a stem that fits this movement or do I need to search for a fhf70 movement specific stem. 

No. You will need the correct stem for this movement, which may be common to other FHF calibers in the same family, but very unlikely to be common with any ETA stems. If there is enough thread left on the broken stem you could use a stem extender.

19 minutes ago, mcoulton said:

4.) What is the best parts source for this movement; Cousins, Gleaves London?

Cousins certainly seem to have a comprehensive stock of FHF70 parts.

You may need to get a more positive ID for the movement. Ranfft lists the FHF 70 as a sub-seconds movement but yours has a sweep seconds hand. It is definitely part of the same family as the 70, but some parts will differ from the sub-seconds 70.

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mcoulton Watch Enthusiast

mcoulton

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Thanks very much for the responses. I believe the next step will be for me to dismantle the movement and have a look. I have a list of items I want to order from Cousin's and if I can figure out what I need from this watch then I'll include them in this order. 

Thanks

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mcoulton Watch Enthusiast

mcoulton

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Hello

I've stripped down this movement and have noted the markings. Can someone please clarify the type of movement based on the photo I provide? Is it a FHF I75 (as is i75) or a l75 (as in L75). I'm also having a little difficulty in figuring out the size for the second hand. I measure the pinion (?) at .30mm (second picture). Does that sound correct? 

 

Thanks

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