There are several 10 and 20 cash coins from China that have crossed flags and some of them, not all of them, say REPUBLIC OF CHINA. The one in our primary picture is from Hunan Province. There was also a short-lived republic (6 months during 1915-1916) which issued coins with similar patterns. The secondary picture further down this page shows another design that is often paired with the crossed flags.
Evaluating these coins is a complicated business. We can supply only very rough guidance on this page. If I knew of a good Chinese coin web site that had plenty of information about these coins, I would reference it here. But I do not know of such a web site. Chinese numismatics (coin collecting) is emerging as, perhaps, the next big area.
Values for these coins fall into two basic groups: low value and high value. It is beyond the scope of this page to differentiate specific coins because there are dozens of subtleties in pattern than can cause a shift from low to high.
LOW VALUE COINS
worn: $1 US dollar approximate catalog value
average circulated: $5
well preserved: $10
HIGH VALUE COINS
worn: $10 US dollar approximate catalog value
average circulated: $40
well preserved: $100
Again, to discern high from low value coins, get a coin catalog at your library or bookstore. Be sure the catalog covers Chinese coins minted during the early 1900s.
Most of the 10 and 20 cash coins that you find today are well worn and, because of that, worth very little. If you have one or more coins with these patterns and it is in good condition with decent eye appeal, seek out a knowledgeable collector or coin dealer for an in-person appraisal.
DO NOT CLEAN YOUR COIN. CLEANING RUINS VALUE.