Seiko Spirit 5S21-0A20 pocket watch from 1990. The 5S21 movement, featuring 7 jewels, is unusual for a quartz movement as it features a perfectly smooth sweep seconds hand, not the usual one ticket per second. This model has has a bronze colour, with case back code "AGPRUP" meaning "Ruthenium-plated on gold-plated case of the cast-in-tone". The case is just over 39mm excluding crown, and comes with the original chain. Light signs of use on the crystal and case, though generally looks good. Fully working, and pleasing to watch the smooth sweeping seconds hand.