Wanted a cool analog speedo for my Lifan bike. Choices are limited mainly to junk new production units or Hi$$ vintage American units. Found this Smiths replica chronometric unit. I really like a chronometric speedo, love watching them work. Any way also bought the matching metal drive unit, and cable. The wheel on the bike is basically the same size overall as the Enfield wheel so it should be fairly accurate. Am really more interested in recording mileage than speed, but speed is cool too. Was around $60 shipped about what a vintage SW would cost on average. The speedo is to be here today. Was in New Delhi India on Fri! Have to make minor mods to the drive to fit it, but looks do able.http://www.ebay.com/itm/Speedometer...Parts_Accessories&hash=item2c5f7db005&vxp=mtr