OK, here's the animal.

Left Side

Right Side

A Peek Up From The Bottom

Notice the iron elbow where the pump mounts.

The Hinge and Scissor Assembly

Back and Bottom of the Pump

Top and Front of the Pump

The Numbers and the Insignia on the Yoke

The numbers are H022072 and the insignia is a "W". The "W" reminds me quite a lot of the Westinghouse symbol. Does this thing ring any bells?