Carhall was a cycling shop in portsmouth. Bought frames and use his own labels . Bought from Witcomb, Bob Jackson, Major Nichols and others. So its difficult to identified The frame and help will be welcome. Frame number 3678. Undernearth Number on bottom bracket 257. Shimano SF Dropouts rear and front. Had a stuck Campagnolo Seatpost. It is removed. Diameter 26.2. The frame was Renovated by Bob Jackson and his label is in photo. Must be a good frame to rebuilt . Carhall Labels is not available. The frame will need to be resprayed.