A case holding ring is used to hold the movement in the case
Other references: T605
for example
This crown suits among other on the following case numbers:
the following case numbers:
Seiko 81332049 Click Spring 4R36-01J0 2nd Gen Monster Orange Seiko Dials A case holding ring isThis product is the original click spring for the Seiko SRP309K1 & SRP309J1 2nd Generation Monster Orange Diver & SKX779 SKX781 1st Generation Monster Diver Related case numbers: 4R36 01J0, 4R36 O1JO, 7S26 0350 6R35 01E0, Related models: SRP309K1, SRP309J1, SRP309, SRP309P9, SRP309P1, SKX779, SKX781, SKX779K1, SKX779J1, SKX781K1, SKX781J1, SPB185, SPB185J1, SPB187, SPB187J1, SNE498P1, SNE498 Reference table: Watch Part Reference Strap 4HX0JB Bracelet