Adrian, thanks for your prompt response. I live at Southam now, since 2002, and before that in south Warwickshire.
And thanks for the excerpt from your list.
I'm pleased, of course, that mine is a rare variant. To the best of my knowledge the forks are original, and I'm certain the cranks are, so yes, fire away.
I found the bicycle in Warwickshire in autumn 1972. I now know the identity of the previous owner, a Fr Sheldon, a priest teaching at a junior seminary near Warwick. It had been painted two shades of blue, and I couldn't recover enough of the original finish to be able to retain it. I did, though, find that it had originally been Service brown, and I've recently found more small traces of paint. I'm entirely confident it was originally in that colour.
When I found the bike it was complete and original apart from the paintwork, saddle and stem, grips, rear hub (3 speed Sturmey Archer fitted) and pedals. Fortunately the pedal rod plungers were intact and free. I can't remember details of the tyres.
I'm afraid I stripped thethough years ago, to 'restore' it. But I'm notoriously slow to do anything, and it's remained dismantled for 30+ years. Rome wasn't built in a day, you know.
Despite a number of house moves I've lost only two screws and nuts (brake shoe retaining). Meanwhile I've gained an original Model 40 saddle and a set of NOS brake blocks. I'm now rebuilding it, with replica pedal rods. It will, of course, be Service brown.
Incidentally, I had a Junior bike when a child. I have a vague memory of walking with my parents to collect it from a BSA factory, though I can't vouch for it.
I await your questions. With good wishes - John Bradshaw