Seiko Birdie Special 320090 Silver Color Seiko Birdie Special Diashock 21 Jewels ● Size (approx.): Diameter (face) 1.7cm, (back) 1.8cm Length 2.7cm (including metal parts at top and bottom) ● Mechanical (hand-wound), working ● Unknown daily rate This item has been stored at home for a long time. It's a small watch and does not have a strap. It seems that金具 and a string were attached to it at some point. The material is believed to be stainless steel (SS). Currently, the crown moves normally, and the watch runs when hand-wound, making a ticking sound. I have not performed any further inspection as I am an amateur. There are scratches and dirt as it is an old item. Please take a look at the photos and understand that this is a vintage item from the Showa era before purchasing.