Performer (PF) series. The Cream version was used on the PF100. The Tortoise is three ply tortoise/white/black and was used on the PF200-400. 1977 PF models had 2 hole pickup rings and require a different size pickguard than the the 3 hole ring 1978 and on models. There was also a 3 pickup PF230. If you need a pick guard for that model let me know.