I purchased the Korean cow bells years ago (1972) at an open air market in South Korea.
The other set of bells I bought here in Israel at a small folk art/antique shop. I really don't know where they are from but I wonder if they could be from India. (Anyone have any thoughts...I'd love to hear from you!) A lot of Israeli students take backpacking trips through India (much as I did in South Korea) and I wonder if one of them brought home bells....maybe. The little bells themselves look similar in shape to Indian bells but I've never seen them hung, just loose.
To see more vintage treasures, visit Coloradolady...bet they know more about their treasures than I do about mine!