All the EC 060 chips I have bought were fake. They were really FULL 100% working 68060 chips with full working MMU and FPU.
But I only bought 1. I can say for a fact it was manufactured in the 1990s but I can't narrow it down any more than that.
I :knuddel: my 68060. What a wonderful chip.
All 1 of them you bought?
Early EC060 chips were full 060 chips that may have failed the MMU or FPU tests. Later EC chips were manufactured with a different mask that doesn't have the FPU. All 75 MHz chips were LC or EC chips with no FPU.