O-Ring Part number for Seamaster 300 full size quartz

Bernardino
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Hi, just after some experts to chime in!!

I’m going to replace the battery on my 2008 SMP 300 and thought I would replace the O-Ring gasket while I’m at it.

I just wanted to check that part number 088.5134NS is the correct gasket?

anyone know?
 
dennisthemenace
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I don't know and I reckon 99.999% of other members wouldn't know either. Surely the person or company you are buying from would know?
 
B
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What’s the outcome, did the o-ring fit?
Bernardino Bernardino
Hi, just after some experts to chime in!!

I’m going to replace the battery on my 2008 SMP 300 and thought I would replace the O-Ring gasket while I’m at it.

I just wanted to check that part number 088.5134NS is the correct gasket?

anyone know?
 
502 to right
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Thread was started in 2021 with no answer. It's now 2025 but I just saw this so I'll leave the answer in case anyone finds this in the future:

Part no. 088NS5143

If you use a generic part the dimensions are: OD 38.0mm, ID 36.0mm, thickness 1.0mm

This is for the 41mm Seamaster Professional 300m (pre-ceramic). This includes all of the Bond SMP's both automatic and quartz and the Peter Blake models (auto and quartz).
Edited:
 
Bernardino
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B Boccaccio
What’s the outcome, did the o-ring fit?
Hi,Yes, it did fit and has sealed correctly. I've worn the watch in water many times since
 
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