Watch List notes:

Han Yong-dal, Han'guk ui kojon (Korean Coins), Seoul 2002, 327 pages, softcover, this appears to be a very thorough catalog of Yopchon (cash), probably in more depth than Mandel, and with illustrations (rubbing or photo) for every furnace number, not just one per type. There are many more examples for the Medieval series. There appears to be a dictionary or finding list, and much informational material, though all in Korean.

Estimate: 75- 100 USD