Roller-Smith Co. Type S3 (ca. 1948 to 1951) Previous
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Roller-Smith was an old and well-known company that specialized in making electrical instruments (and still exists today as TDE Alstom). They apparently acquired the design and tooling for the Stewart-Warner meter and reworked it into a socket version. The same accuracy problems that plagued the Stewart-Warner meter could have carried over into the S3, bringing about a quick end to its production.
 
Roller-Smith S3 pointer
Photo by Bud Russell		 Roller-Smith S3 odometer
Photo by Dale Sindelar