Seiko 3027 V1Z (3027-29Y) Capacitor (MT-516F) for Seiko VS82, V181, V182, V187 and other V18 series modules
This capacitor is a version of the Panasonic MT516F cell with tags and a spacer as shown. It is the replacement battery for the Seiko 3027-29Y, which is no longer available.
The origianal 3027-29Y battery used the MT616 cell, which is 1 mm wider in diameter than the MT516F, this is why the black spacer part is required.
This battery is used in Seiko watches with the following watch movement calibres: