Willard / Captain Willard

Polishing destroys the case geometry that identifies this reference

The -8110 case has defined flat surfaces and a sharp transition into the crown guard. Heavy polishing rounds these and thins the lugs, which is a condition finding of real consequence on this reference specifically — a heavily polished example can no longer be compared against reference geometry, so several other checks become unavailable at the same time.

6105B in a -8110; a 6105A suggests a movement swap

The case number names the caliber family, so any 6105 movement is the right family. Within it, the -8110 is documented with the 6105B. A 6105A in this case is most likely a service or donor movement rather than a counterfeit — Seiko service work moved parts freely — but it should be recorded, because the movement no longer dates the watch.