Air Sampling Pump and Sampling Cylinders.
Made from Steel, Brass and Rubber. Size Pump 14″ inches (closed), 20″ inches (extended). Cylinders 9″ x 1″ inches.
The Air Sampling Pump was used to take air-samples for testing. The Cylinders would push and screw into the pump on a bayonet style fitting and the Pump would work like a bicycle pump action (push in and pull out, with a one way valve, pull air into the pump chamber and push that air into the Cylinder under pressure).