Please note that we specialise in SMITHS MOTORCYCLE instruments with Magnetic type movements. From 1964 onwards most SMITHS motorycycle instruments were of the Magnetic Movement type and can be identified by having SSM (speedometer) or RSM ( rev-counter ) at the begining of the part number. SMITHS CHRONOMETRIC 90 MPH SPEEDOMETER. SMITHS CHRONOMETRIC 90 MPH SPEEDOMETER. The face is in a condition that can be straightforwardly restored. SMITHS CHRONOMETRIC 90 MPH Postage will be Royal Mail or Courier Second Class from Bude; should a different service be required, please apply before purchase/payment. My 1951 NH project is missing its Speedometer. I know I need a Smiths Chronometric 0-120, with the trip adjuster knob sticking out the back. I don't really want a repro' and have a search running on eBay. From 1964 onwards most SMITHS motorycycle instruments were of the Magnetic Movement type and can be identified by having SSM (speedometer) or RSM ( rev-counter ) at the begining of the part number on the dial face.
The variety of speedometers fitted to the MGB is a common source of confusion, especially in relation to the fairly common practise of swapping O/D and fully synchronized transmissions into MGBs that didn't originally have them. This will consequently cause the speedometer and odometer to read too high or too low, not an ideal situation.
Smiths Chronometric Speedometer Serial Numbers Free![]()
'Revs' in the table below referrs to the turns-per-mile (TPM) the speedo expects to receive from the transmission via the speedometer cable. The TPM of your speedo should be printed somewhere on the face, along with a serial number.
Any variation in tire size from original specifications will of course also have an effect on the accuracy of your speedometer. See the discussion on tires and tire sizes in the Service section of the Tech Library on this website for more information on this topic.
Repairing Jaeger & Smiths Speedometers - Free download as PDF File (.pdf), Text File. And the speedometer serial number and the make/year of your car. Dragonfly Smiths Chronometric Speedo WARNING. Our lovely Smiths chronometric speedometer was sent away to London Instruments (London SE20 8RY) for a service/overhaul before being fitted back into.
The NAMGBR also has a cross reference table from car numbers to speedometer serial numbers by Orin Harding. [Ed. Note- this link seems to have gone MIA, so I've duplicated the table below.]
KMR reports that if you have a setup that doesn't correlate to any existing speedometer type, Nisonger can put a new faceplate on your speedometer, and recalibrate that way. Check the Directory section of this website to find a list of companies that provide Smiths and Jaeger instrument servicing.
Tooth count (transmission):
Thanks to Bruce Mills for scanning and submitting in this chart - it's a lot more complete than the chart I was building!
MGB Smiths Speedometer Range and Turns-per-mile (Revs) Reference Chart
Smiths Chronometric Speedometer Serial Numbers LookupMGB Speedometer Cross Reference Chart
by Orin Harding, NAMGBR
The information displayed here is from MGB Driver, the MG Mailing List, on the Internet, or other sources. The North American MGB Register assumes no liability for the accuracy, safety, or legality of these contributions. Any opinions expressed here are those of the contributors and do not necessarily reflect the opinions or policies of the North American MGB Register.
Smiths Chronometric Speedometer Serial Numbers List
Smiths Chronometric Speedometer Serial Numbers For Sale
Smiths Chronometric Speedometer Serial Numbers Chart
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