Hard to tell from that one photo, but they look like 3rd generation Python grips. The checkering will be on a raised portion of the grips. They could also be for a later Trooper. Photos of the inside and other side would positively ID them.
I'll post a photo of 3rd Gen Python grips in a few minutes. If those are, they're worth $250-$350. Troopers, not so much...
Edit:
Here you go...
Note the grip pin location.
