Got it. It is 18" from centre of bb to top of seat tube. 16.75" c to c. Same as my other 3, so a 17" in KHS terms. No cracks in welds and the tyre rub looks worse in the pics than in reality and is only on that one side.. I'm quite pleased.
My subconscious brain was right when I said 4x 17 originally
. Weighs 1520g with 2x headset bits in and 4x steel bottle bolts. Should be able to easily get it under 1500 by replacing the steel bolts with ally and removing the headset.. will also need to add rear brake bosses so am adding weight there..
Crap. I've bought another project. I'll need to start a build thread and ask for advice as I know very little about components and group sets after 1993/4.
Works: 90 KHS Montana Pro, 92 KHS Montana Pro, 94 Raleigh MTrax 3000
Almost works: 93 Raleigh Dynatech torus LX
Doesn't work/In bits: 93 KHS Montana Pro to Team, 95 KHS TiLite, Some Raleigh Dynatech and Mtrax frames.