great.............. lol, well my frist thought and bill agrees with me, was Lake Mohave with overall shape and flaking pattern, especially with the stem being longer than the blade. last night studing the piece that small concave base has me wondering tho, i did see a Lake Mohave with a similar concave base. The base is thinned and ground very nicely, im still kinda sticking with Lake Mohave, Bajada no, but maybe possibly Escobas