O-ring for GMT IIc

[maas]

Hi all I would like to buy a few o-rings fore case backs in order to improve water resistance... Would anyone be kind enough to tell me what size I need to buy ?

Thanks

[alligoat]

Sizes vary, but I measured one from a Sub case- it was about 33mm diameter- thickness, maybe .75mm- that's just a guess.

Here's some gaskets from Ofrei's:

http://www.ofrei.com/page_106.html

Maybe an assortment would be a good idea.

[maas]

Sizes vary, but I measured one from a Sub case- it was about 33mm diameter- thickness, maybe .75mm- that's just a guess.

Here's some gaskets from Ofrei's:

http://www.ofrei.com/page_106.html

Maybe an assortment would be a good idea.

Thanks dor answering alligoat, I guess That's what I'm going to do... Let's go for an assortment...