wow that is virtually identical to my master light when I bought it, complete with full shimano groupset (not sure if mine was 600 but sure looks like it). I put campag SR 11 on mine. So it doesn't look period but rides right.

Bike was basically unused when I bought it (been stored for 10 years or so having not been ridden more than 50 miles or so) so I have a complete shimano groupset somewhere in my shed, virtually pristine, right down to headset & hubs.

edit - here's what it looks like with campag