Hi Folks,
I bought this old frame recently and have stripped it down. It came from an old bloke here in Sydney who reportedly got it from his mum. She apparently said it was Gary Sutton's bike. It is fairly old and is a 5 speed rear wheel with very close spacing. The OLD appears to be around 126mm but i has definitely been opened up a little. I am trying to identify it if possible. Please see photos below of the parts and frame junctions. Info relating to dimensions also follows - thanks for your help!
Rear mech: Zeus Gransport 2 - 5 Speed
Front mech: Campag ?
Crankset: Magistroni
Brakes: Weinmann Type 730
Rims look like Weinmann High pressure
English threaded BB - Nervex followed by lug set numbers. Then stamped over the top W 6924
Seat tube ID / OD: 26.6 / 28.6, CTT: 560mm
Head tube ID / OD: 29.8 / 31.6
Top tube OD: 25.6, CTC: 575mm
Frame weighs: 1937g
Fork weighs 910g

I think the serial number position and format is consistent with Speedwell.
I know they used Nervex Pro lugs on their Olympic model but, as far as I know, those only had track ends, so this must be a different model. Possibly from around early 60s?

Here's another Speedwell number with a 'W' prefix:




The fork is also most likely original. Here's a an example with Nervex lugs and that fork crown:

Thank you Maurice! That gives me somewhere to start. I will look into this option further. Early 60's sounds about right from thew sellers perspective too.