Japan. Tempo tsuho (天保通宝) Edo period, 19th century ◆Tempo tsuho (天保通宝) size: 50×30mm weight: about 20.6g number: 10 Tempo tsuho (天保通宝) is a coin circulated in Japan from the end of the Edo period to the first half of the Meiji period (1868-1912). It is also called Tempo sen (天保銭). The shape is oval, reminiscent of koban coins, with a square hole in the center, “Tenpo Tsuho” on the front, “Touhyaku 當百” on the back, and the Kaneza Goto family's seal on the bottom cast in the upper part. The material is an alloy made mainly of copper, which also contains lead and tin. Please understand that they have some rust and dirt Old things are beautiful and so wonderful. Carefully packaged and shipped from Japan to overseas. We currently have other rare items for sale, so check out the auctions.