Just joined this site as I'm hopping to find some info on an old bike that I own. It's a early Rudge Whitworth commuter type bike, the chain is unusual as it has 3/4 inch spacing between the links. It has a Sturmy Archer hub with a two speed gear change on the cross member although the hub has Sturmy Archer Tricoaster Nottingham England stamper on it with the serial number KC69342. I've tried researching this serial number on various web sites including the Sheldon site without success. I'm just trying to work out the year of manufacture for this bike, I'm thinking it may be 1920's or 30's. Maybe someone here can help.