This chain came with either Dura Ace or XTR group set back around 1995.
It was Shimano's flagship chain. Probably a long shot to find a New Old Stock one but you never know.
A close alternative is the XT HG91 chain of the same era
Both are all silver.
The answer was a simple one in the end. As advised above, thank you benjabi, and the chap I met last week: fit a Hyperglide (NOT Hyperglide C) 12T cassette.
Excellent
I should ad that the black lockring is the microshift jobby. The one on the left is Mavic, it fits the freehub perfectly, but can't get passed the microshift cassette to engage the threads inside the freehub.
Funny thing happened this morning. I took an early ride out on my '77 Ciöcc. I was sitting by the sea wall where I stop for coffee. A bloke who was working nearby came over and starting chatting about my bike.
He obviously knew a thing or two because he spotted the columbus tubing and the group...
I don't know what I'm doing wrong here. I have an 8 speed Micro Shift cassette. When I fit it to my hub, an 8 speed Ultegra hub, it rattles when the lock ring is tightened, so I put in a spacer that fitted fine.
Now though, there is no chance the wheel will fit the frame without the cassette...
Update on above. Only just got round to fitting cranks proper. The 123.5 axle is too narrow. Grrrrrrrr.
The nuts for the small chainring are just about fouling the frame lugs. And I had to replace the non drive side crank arm with a flared one as that was also fouling the chainstay.
Looks like...
Does anyone know if I'm setting this up right?
The front cable hanger is very slim and doesnt have the aperture for an adjustable barrell stop. So do I just run the cable through it with a ferrule?
Sorry the pics are a bit out of focus...