This is a very specific question, but I hope that maybe a member of the Mac community may be able to offer a clue.
Years ago there was a free Mahjong game called Double, or Double X. It no longer runs on current hardware or software, but I am interested in the icons which it used. Here is a screen shot:
Does anybody know where the icons come from? The developers at PCV, who created the game, are no longer able to tell me.