Re:
Not sure if this is what you are looking for, they are '94?
170mm
52 Outer is marked with C in diamond and is for record looking at the siting of the chain pip. It has got ramps to work with 39 inner 8/9s campag chainrings are same in terms of width.
Inner is older 8s 42 tooth ring AS.
complete with left hand threaded captive bolts extractors
Can't seem to find a CRec rear mech
but did find loads of other campag bits including CRec seat post 27.2mm.