I couldn't swear to it, but I think that might be an L16 pressure plate. I've got one here, originally off the engine in the rolled rally car that DatsAndy bought, and I've laid it over an a-series flywheel and it just fits, and the disc is similarly 200mm (iirc there was a thread on here and it mentioned that there are 3 clutch plate sizes with centre spline sizes for 63/71 sized boxes, or something like that (the smallest is for an a-series with 63 box, and the two larger ones are for smaller/larger L series 4s)