Can't help with the Japanese coin, but the Chinese coins (all 1 cash) are as follows: 1. Jia Qing Tong Bao Board of Revenue Mint Beijing cast under Emperor Ren Zong (1796-1820). Can't date the coin exactly without weight and diameter. 2. Qian Long Tong Bao Board of Revenue Mint cast under Emperor Gao Zong (1736-95). Can't date exactly - see above 3. Guang Xu Tong Bao Guangdong Mint milled coin issued under Emperor De Zong (1875-1908) This coin issued 1890-95 if over 2.8g, or 1895-99 if less than 2.8g. Hope this helps.
Under the 50 on the Japanese coin (my wife tells me it is Yen, not Sen - Sen was before WW II) it says Showa 45 which would be the 45th year of the Showa Emperor (Hirohito). That would make it 1970.
Okay here are the weights and diameters of the coins. 1. 24.06 mm.3.7 Grams 2. 22.25 mm. 3.7 Grams. 3. 24.06 mm 3.0 grams.
I should say these coins are genuine, at least the first two are definitely genuine. The third one is a early milled coin in China, looks also genuine to me. But the best way to tell is to feel it with my own hands.
Sorry to bump this thread but a user said they could date the coins closer if they had the weights and measurements, which I posted. I dunno if that user forgot about this thread or not.
Sorry....just been busy. The Jia Qing and Qian Long cash are difficult to positively identify when not in hand, but my best estimate is as follows: Coin 1 - Hartill 22.466. Board of Revenue South Branch 1816-20 Coin 2 - Hartill 22.220. Board of Revenue South Branch 1775-81 Coin 3 - Hartill 22.1335 1890-95 All three look genuine to me.
