Pocket Watch Kelly Style Exhibition Back See-through Seikosha Rare

This is a SEIKO Unique see-through back, skeleton pocket watch, not found on Mercari.
The see-through back Unique pocket watch is an original, not a modification, and may be hard to obtain.
The movement has a SEIKOSHA engraving, so it may be from the 1950s.
It might be an extra flat or super movement.
The Kelly watch style was likely added later.
The belt is damaged but still usable, but may crumble, so consider it a bonus.
It is currently working, but has not been overhauled, so please assume an overhaul is needed.

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