Korean (I think) cash

[Magus]

Could anybody give me more information about this coin, like the denomination and about when it was made?

[Prosit]

Is the date on the holder in question?
Dale

[translateltd]

Korean "cash" are known as "mun" (= mon in Japanese).  The Sang-pyong thong-bo coins were struck from about 1678 to 1900 according to WD Craig, though SCWC dates them to 1806 - not sure how this specific date was arrived at.  Your piece has the mintmark "Ho" at the top for the Treasury Department, and privy mark (also called furnace number) 9 at the bottom.

  

[Magus]

Is the date on the holder in question?
Dale

Yeah, but I don't have any idea where they came up with it, so I was asking here to confirm its accuracy (or lack thereof).

[Chinasmith]

Yes, a Korean coin from the Board of Revenue Mint in the capital. The dating in the Krause Standard Catalog is taken from Edgar Mandel's catalog of Korean cash coins. Keep in mind, however, that the Krause catalogs are now broken up by century, so if a coin was minted during 1780-1880, they would put part of them in the 1700's book and part in the 1800's volume.

[weepio]

If there is a dot on the leftside of the coins backside, the date would hold. If there is not according to Mandel the coin should be dated 1757-1806.