The "Smiths" brand speedo are built by Caerbont Automotive Instruments. Which is a management buy off from VDO. On their Website CAIGAUGE.COM is also a instruction how to recalibrate the speedometers. My speedometer also showed a few km/h less and I recalibrate it myself. Some GPS receiver say that you drive with 1-2 km/h while standing in front of a traffic light.

Keep mooging,

Christian

2006 4/4 70th anniversary, 1985 VW 1200 50th anniversary, 1977 Vespa 50 Special, 2003 Vespa PX 200E