olly708

Thanks for the replies so far. I measured the (SR) seat pillar that came with the bike and it's a tad over 25mm diameter (sorry, I don't have a micrometer). Definitely less than 26mm. The bottom bracket is still in situ, it's a sealed bearing Shimano (or similar) splined b/b which I suspect was replaced by the bike store prior to the previous owner purchasing the rebuilt bike. It turns very smoothly but without removing it I can't say whether it's British or Italian thread. I've added a few more photos - bear in mind that the paint in these photos is only a couple of coats of primer, quickly applied to keep any rust at bay before I decide what colour to paint it.







I don't honestly think it's anything wonderfully exotic, but it would be nice to have some pointers from some of the experts on here.