Seiko & Citizen Watch Forum Message Archive

i agree with the demonstration above, i always understood that He-problem pressure into the case of watch appears in SAT diving (when the divers are into the local, out of water, in He-O2 atm)in the "decompresssion phase" : standart gaskets are permeables to He. Seiko in efect built a gasket virtually "He-proof", and Omega did the same with ploprof: one piece case and "overcompressed" gasket, no He gas escape valve.

Now waiting for a Mr Tokunaga'answer to be sure!

Thanks all, was a very interesting post (continuation of what PoseidonJim said); it's imo good to make hypotheses and to discuss about!

cheers!