They certainly look like Chorus Shaun. I find it difficult to distinguish between Chorus, Croce D'Aune, indeed there's some Xenon & Avanti Cranks that look very similar as well. One common factor though is the stamps on the rear of the crankarms - size, thread, year all that malarky. These don't - simply the 65 up by the knuckle.
They aren't Sachs New Success either as they have the stamped arms in the same vein as Campy.
Oh and these aren't a patch on Tel's polishing - I wish he did that full time - I'd be delivering a box full of stuff for polishing
Rick Powell 753 Track / Ribble Gran Fondo / Colnago Asso / 1975 Harry Quinn TT / 1990 Concorde Prelude / Vitus 992 / Keith Coppell Lo-Pro / 1986 KAS Vitus 979 / 1995 Mercian Strada Speciale / 2011 Raleigh GAC Militis 3 ex Graham Briggs / 1995 Ribble 7005 / 1986 Alan Super Record / 1985 MK1 Vitus 979 /
On the bench: Sirius 853 TT / Sun Solo Chrome / Ciocc Designer 84 / Giant TCR0 Pro Compact / Ribble 653 Tourer / Daccordi Lo-Pro / Look KG96 / Bottecchia Equipe / Look KG231 Credit Agricole / Contini Grand Prix / Aende Lo-Pro / TVT / Langdale 653 Pursuit /