Thanks Both
Well I guessed late 60's early 70's by the lugs and the cable stop on the drive side rear stay but who knows.
The bit that confuses me most is the Shimano ends, they don't look the correct period and I wouldn't expect to see them on a European frame, well certainly not one from before the 90's really and I would have guessed at mid to late 90's at that.
The frame angle brings back memories as I had a Columbus framed bike of similar geometry in the early 80's that was old then, no steering and peddling at the same time unless you wanted to connect your foot with the front wheel but a very quick and agile frame once you got your head round it.
Anyway I've had another look over this one and to answer the questions:
124mm measured between the inside of the rear dropouts.
Haven't checked the steerer yet but 487 stamped very deeply on the bottom bracket in small text and then facing the other way in larger font but not as deep the number 11.
Also it has two clamp stops, one for the levers and one for the cable clamp at the bottom bracket which are quite distinctive
Pictures below.