Yep, whenever you've got a cash coin you can't find illustrated in the Chinese lists, chances are that it's from one of China's neighbours: Japan, Annam, and Korea all issued "cash-style" coins and superficially look the same as Chinese ones, to those not familiar with the various series.
Unfortunately, most of the books and websites on "Chinese cash coins" don't bother mentioning this fact, leaving beginners puzzled when they come across a non-Chinese cash. If anyone knows of a good, reasonably comprehensive "all cash coins in one volume" book or website (besides zeno.ru), let me know.
Annamese cash often come with a greenish tint like that; it's considered normal and nothing to worry about. I'm told that if you go to Vietnam and visit the marketplaces where these coins are sold by the bucketful, you quickly find out why this is so: the coin booths are open-air, with the coins just sitting out in bowls in the tropical sun... and tropical monsoons.
Unfortunately, most of the books and websites on "Chinese cash coins" don't bother mentioning this fact, leaving beginners puzzled when they come across a non-Chinese cash. If anyone knows of a good, reasonably comprehensive "all cash coins in one volume" book or website (besides zeno.ru), let me know.
Annamese cash often come with a greenish tint like that; it's considered normal and nothing to worry about. I'm told that if you go to Vietnam and visit the marketplaces where these coins are sold by the bucketful, you quickly find out why this is so: the coin booths are open-air, with the coins just sitting out in bowls in the tropical sun... and tropical monsoons.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis






















