
It is well built with some very pretty lugs, scolloped chainstay tops, diamond re-reinforcement on the brake bridge,has Campag f/r dropouts and a slotted B'Bracket shell. 27.2 seatpost dia.
I originally thought it might have Haden lugs but the fork is Tange factory built, stamped for 1978 with a Tange fork crown so maybe the rest of the lugs are Tange? Tubing also maybe?
Has anybody seen this style of lug before, I can't find an exact match.
It came with a Campag B'Bracket and a headset engraved with COLNAGO which is a new one to me. Are they a common fitting on the Colnago bikes?

I founds that Tange made forks for TREK at this point in time to be used in TREK frames, so maybe it's a steel TREK?
I will say that it is not a light frame (unless Campag make their bottom bracket sets out of lead, I haven't removed it yet) Which tends me to think it is possibly plain gauge tubing of whatever type.
So, info sought! Anyone recognize the lugset? What's with the COLNAGO headset? Is it a TREK? If not - any idea what it is?
Very nice frame, I'm going to enjoy building this one up. My best guess at the moment is a Japanese builder, whatever it was branded as or maybe a custom Oz build using an off the shelf fork?
Cheers
Richard