Last week I bought an assortment of 31mm to 40mm o-rings on Amazon only to find that the 31mm o-rings were actually all 32mm.
Today I just got in a different set and the 31mm AND 32mm o-rings were 30mm!!
I’m virtually certain in both cases they knowingly aren’t including 31mm and bagging up...
5 pieces NEW Seiko caseback gaskets (O-RINGS)
For 6306, 6309, 6105, 7002, 7S26, 7548, 7C43 (Large Diver's Watch)
Perfect fit for your dive watch needs. I'm especially thinking of all you skx007/009/173/175 wearers out there!
*Does not fit skx031 or 033 - I found this out the hard way and...