I seem to perpetually collect old bikes which have been have been hand painted & therefore the original manufacturer & any decals lost & unknown.

I did post this frame with a couple of photos very quickly last year without any information bit silly really, having left it for over a year, I’ve now dug it out & started work on it again, so hopefully with some more information it maybe possible for people to recognize it.

The frame number F3E00010 interestingly its stamped in line with frame & not across the BB, the seat post size 25.8 mm, the frame looks reasonable quality with the forged seat post clamp, & drop outs, very noticeable is the very thin gauge of the seat post, the only other bike I have where that thickness appears to be the same is a chrome-moly frame, the head-set lugs are also very light gauge & are faintly stamped G3 assume this is of course a lug part number. The rear brake cable routing is very neatly via a brazed in tube in the top tube. The rear dropout spacing is 128.mm I’ve no comment on the bike’s geometry but I noticed when I stripped the bike & I’ve since rebuilt the rear wheel & with a new tire its about 13. Or 14.mm clear of the rear of the seat post tube, to me that’s very close.
My humble guess is one of the Centurion models.