The 950 had some redesigned internal parts-
Quoting from one of their bulletins-
"Our Old Type Model 850 Electric Meter Pump was introduced in the early part of 1930 and at the time was recognized as the greatest advancement in the development of Electrically Operated Meter Gasoline Pumps.
Through extensive research and development our Engineering Department has since succeeded in creating a greatly simplified and more compact design and arrangement of the operating units comprising the Piston Displacement Meter, Regulating Valve and Air Eliminator. This later development eliminates numerous parts and provides greatly simplified operation."
It goes on for an additional four paragraphs but you get the idea. The literature also shows an Old 850 before and after the conversion.
Ron
