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Seiko Instruments:
S-29130 = S130 = 93c46
S-29131 = S131 = 93c46-Rotate
S-29220 = S220 = 93c56
S-29221 = S221 = 93c56-Rotate
S-29230 = S230 = 93c56
S-29231 = S231 = 93c56-Rotate
S-29330 = S330 = 93C66
S-29430 = S430 = 93C76
S-29530 = S530 = 93C86
S-29630 = S630 = 4096Bytes