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Bulova gasket

Sandy13
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Sandy13 Member

Sandy13

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I have a Bulova 11ACC and need a case gasket. The movement is 29.5mm. Regular gaskets will not hold the movement in the case ( a front loader). I suspect there must be a custom gasket required. Any help would be appreciated.

jdm Distinguished Member

jdm

Posted
Posted
23 minutes ago, Sandy13 said:

 Regular gaskets will not hold the movement in the case ( a front loader).

Maybe there is misunderstanding about what a case gasket dies. In no watch it holds the mov.t. Can you post clear pictures and explain im detail the problem that you have. 

Sandy13 Member

Sandy13

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Picture #2 : the maximum outside diameter is 29.50 mm

Picture #1 : the maximum inside diameter is 29.55 mm

Picture #3: shows the gap of 0.05 mm that would need to be taken up by a gasket that would have to cross over the case tube and be pinched against the case.

My question: is there a particular gasket for the this watch.

 

33.jpg

44.jpg

55.jpg

mikepilk Distinguished Member

mikepilk

Posted
Posted (edited)

It looks like there is a groove for a gasket to sit in (yellow arrow) ? 

I assume your measurement of 29.50 mm is the flat surface below the groove ?

If so, you need a gasket to sit in the groove, with an outer diameter of slightly more than 29.55 mm.

Cousins gaskets with 29mm internal diameter, and thicknesses of 0.3, 0.4, 0.5 mm etc . One of those might do it.

But, I've never seen a gasket used to hold the back in like that! Strange

image.png.8e3867e60eedd16b66cd2e0afd1e4a29.png

Edited by mikepilk
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Randy55 Watch Enthusiast

Randy55

Posted
Posted

Sandy

You might be able to get a gasket by calling a watch parts house, Like Cousins ( in the UK ), or Jules Borel ( in the U.S. ), using the number stamped on the inside of the case back, but it may be a bit of luck.

I think Mike has steered you in the right direction !

The case is stamped "waterproof",..so this could either be a round or flat gasket, depending in the tolerances,..so you may want to buy a few in the size range he suggests,..in both profiles.

 

Randy

jdm Distinguished Member

jdm

Posted
Posted
2 hours ago, mikepilk said:

It looks like there is a groove for a gasket to sit in (yellow arrow) ? 

Hard to tell because the picture is not clear enough. However I think that it could for be an or O-ring with ID 29.5 or there about, a small section diameter like 0.4mm. The flat rims of the two case halves must be able to touch each other or be very very close.

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