Reason for being a "訳有り品" (Defective Item) Loses about 30 minutes per day. Manufactured by Suwa Seikosha in 1972 (Showa 47) Model Number: 6106-7590, Serial Number: 202850 Length: 40mm, Width: 27mm, Crystal: 30mm, Thickness: 13mm, Lug Width: 18mm Aftermarket leather band, suitable for wrists up to 19cm No unusual noises when shaken, good power reserve, working condition Crown and calendar functions operate normally Calendar can be adjusted by pressing the crown lightly or firmly Water resistance has deteriorated due to age. Suitable for hand washing and light rain. 9-faceted crystal cut glass, dark brown dial Overall, there are small scratches and scuffs Please understand that this is a "訳有り品" (defective item) before purchasing. Please refrain from purchasing if you are sensitive to imperfections or seek perfection. Thank you for viewing.