Spork! wrote:Has been repainted at some stage and serial has been mostly filled with paint , but I think it's: D 01017548
My calipers are at father-in-laws, but I'd guesstimate that the seat pole is 1 inch diameter.
Possibly a 1990 model. Certainly looks to be between 1988 and 1992, anyhow.
Seat posts vary in 2mm increments. The smallest size is 25.4mm and generally used on the cheapest/lowest quality frames. The largest size (on retro steel) is 27.2mm, which is what was used on top-of-the-line models. I've got a feeling that yours will be around 26.4mm, but I may well be wrong.