BSA C15 250cc Trials Bike. Pre 65 Trials. Factory Bike

BSA C15 Trials. Genuine production trials engine and frame - I believe them to be the original pairing but do not have any documentation or V5 to confirm. I believe the likely original registration date was 1961.
I got this bike around 35 years ago in pieces. I assembled it and found that many parts were wrong so decided to rebuild it. It was started but never completed. New projects came along and the bike has sat in my garage ever since! It had new wheel rims 18" rear and 21" front and the engine was rebuilt using new parts. The gearbox had too high a gearing so the gears were replaced to give trials ratios.
The front yokes are the correct ones for the C15 trials but the forks are from a B25. There are brand new rear adjustable shock absorbers bought from Sammy Millers along with new footrests. A 61 tooth alloy rear sprocket and a new rear alloy mudguard.
The alloy tank is a bit battered but usable and there are the original fuel tank. oil tank. tool holder and rear shock absorbers. Over the years I have gathered odds and ends which are all included - please see the photographs.
There is a Haynes manual and photocopies of the original BSA service manual and parts list as well as some receipts and additional datasheets.