Some info...
MODEL A FORD SPEEDOMETERS
The following material covers the disassembly, cleaning, repairing, installing decals,
lubrication, calibration, and assembly of the familiar oval speedometers manufactured by
Stewart Warner. Oval speedometers were also produced by Waltham and Northeast
Appliance Corp. Northeast produced an oval unit without a trip indicator, and with a
speed indication from 0 to 80 MPH. Hopefully these instructions will be of some use if
you have a Waltham or Northeast Appliance unit. Refer to MAFCA judging
Standards for questions of authenticity, such as style of numbers, thickness of the rim of
the bezel, trip indicator, red and white pointers, etc.
Beginning in early or mid 1930, and continuing throughout Model A production, Stewart
Warner produced the round units without a trip indicator. Waltham and Northeast
Appliance Corp also produced round speedometers.