Ok. As it turns out, the cymbal IS an A. Zildjian. The "A" is just very faint on the cymbal, as is the "c" in Constantinople. Zildjian first used this stamp on cymbals that were marketed through Gretsch in the 50's, then used it on the brilliant A. Zildjians during the 70's/80s.As for being unfamiliar with the sound, how bad can I do for $20 plus shipping? It was posted at Guitar Center dot com, but they didn't know what it was due to lack of ink, so they sold it for cheap.
Regardless of the A being there, its NOT an A. Zildjian, its a Zildjian & Cie Constantinople, a completely different line owned by the Avedis Zildjian Co. in the same way that modern K. Zildjians are a completely different line, and K Constantinoples (KCons) are a separate line. If you take some time and search this site you will learn a lot about the historical origins of Zildjian cymbals from their early 17th century beginnings to the move to America of part of the family in the early 20th century, the eventual absorption of the Turkish Zildjian business at the end of the '70s and the split between the American Zildjian brothers which resulted with Robert Zildjian's founding of Sabian. Its a complex story which accounts for the various brand names Zildjian cymbals have been sold under, both here and in Istanbul.
There is a lot of complexity understanding cymbal stamps.The members here have been learning about them for years with Drumaholics assistance. Don't jump to conclusions
As for the price, if its as advertised, you can't go wrong for $20 regardless of the size, unless its severely cracked. BTW, what size is it?