Anyway, I think this is a sash chisel. It is a little thin to be a mortise chisel, and is too thick to be something else. Maybe a firmer. I dunno. Anyway, it's a Witherby Winsted Conn. chisel, in very nice condition. It is loooong, measuring 15" overall, with 8" of iron, not including the socket. $20 plus shipping. First PM to say I'll take it.