A field guide from Tiny Hour Tales

Seiko Almanac is the reference desk of Tiny Hour Tales, a shop for curated vintage and modern Seiko. We kept needing the same tools — a serial decoder, a caliber reference, a way through decades of catalogue — so we built them, and opened them up.

Everything here is meant to be honest and useful: the decoder tells you when it can’t be sure, the caliber dates are marked as approximate where the community disagrees, and the catalogue is drawn straight from period Seiko brochures rather than second-hand lists.

It’s a work in progress, growing one tool and one product line at a time. If something’s wrong, tell us — accuracy is the whole point.