There were two versions of the 1988 1/10 angel, both having an AGW of 1/10th ounce.. KM#159, a proof (mintage 1,000) with the letter A privy mark, is valued in the latest Krause catalog at $85, which was a substantial premium over melt when the book went to press, but a pretty small premium now. KM#194 is a business strike, mintage not specified, valued at $70 Unc. in the same catalog, which was somewhat below melt when the book went to press, and quite a bit below melt now. There is no picture of KM#194 and the descriptions of both designs are the same, so I have no clue how to tell them apart except by whether or not they appear to be proof.
Krause is the only reference I have for British coins, which I don't collect except as part of my OFEC. It doesn't say anything about errors for this, or any other, coin.
As mentioned in your other posting, please post picture of the reverse. That may help to see if it is an error.
No sign of an "A" privy mark on either side, and neither mirrors nor sharp strike, so I'd guess you have KM#194, worth about $78 as bullion, and falling.
I would say it is an error, but since very, very few collect these I doubt it has any value over and above the bullion content of the coin.
Hello, I truly appreciate all the responses! I will have it appraised with a coin collector in Los Angeles, CA. Apparently, I was told that there is a demand for these coins because of the low mintage and Pobjoy Mint winning the COTY for this coin's design. Errors from Pobjoy, especially for this coin, are extremely rare so,there is a chance this coin might fair a bit better. We'll see...wish me luck.