Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I found it

“Steam Motor 1/2 x 1/2 ‘S’ series
1/2 inch bore by 1/2 inch stroke
Single acting piston valve
I have yet to finish it (arrived pre started)

Arrived with the blue prints
Never been able to find out who where or what
Plans call for ME x 40 threads
 Measurements in imperial fractions
Pump capacity 6 or 8 gallons per hour.

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