Clutch year

[seek4ws]

what year is this clutch from? Came off a 79 but looks like a early xs1 clutch.

 

[TwoManyXS1Bs]

The pressure plate is 256, no engagement splines, 70-73.
I see 6 friction plates. If 3.5mm thick, then 70-73.
Look for an index dot on the clutch hub. If none, then 70-73.
Edit: Lack of oiling holes in the hub, it's a 256, 70-73
The baskets are interchangeable...

 

[seek4ws]

Thanks for help!