Size 33 mm.
Obverse
精勤章 - Diligence Badge
reverse
仙台逓信管理局 - Sendai /is the capital city of Miyagi Prefecture, the largest city in the Tōhoku region/ Posts and Telecommunications Bureau
區内三等郵便局 - Ward 3rd Class Post Office
逓送集配人奨励會 - Postal Delivery Personnel Promotion Association