Alexander The Great?

Many thanks indeed for all the information, which I find most interesting!
Presumably 'SC82.7' identifies exactly the coin, but what does 'Price 3708"""' indicate?
My friend, 12 years ago considered it's value at about £60, 'if genuine'.

Since I don't have the Price volume I have to ask, what is it about this coin that links it to mintage by/under Seleucus I since his name does not appear on it? The monogram in the wreath?

For what its worth, based on the appearance in the pic, Peter, the fabric of your coin looks absolutely correct for a silver tet. I think you can expect it to be approved as authentic.

It is a genuine coin and frankly has very nice toning on it. arnoldoe's valuation I would say is a little conservative, I would put retail at 200GBP/275-300USD with the toning being one of the big pluses on this coin.

On who struck it you need to first identify the mint and date of minting which corresponds to a certain Macedonian Didochi's Kingdom. The price guide should already have this step completed so should help you out. To identify coins you can use Wildwinds here http://www.wildwinds.com/coins/gree...r_III/t.html to identify the mints/dates/rulers corresponding mintmarks. I have found that generally a monogram in a wreath on an Alexander the Great con will generally correspond with the Middle East with Babylon the most likely mint.