heres one of my recent finds. im sure its gold, but it does not have a number indicating what karet. it has three very small halmarks. found with mycz20. im thinking its 18 or 22. need a link to asian hallmark examples please.

If it's brass/bronze/copper/gold-plated-silver..........it'll ID as a high-tone on the CZ-20. If it's gold.........it should ID as a mid-tone. This is a good starting point.

reads 24-26 on my f75. 2.2 grams size 61/2
most gold rings this size are around 20-23 on my f75.

That's around the mid-foil range. Quite a bit below nickel. Yep. It's gold!