This web page disappears October 26.

Above, the trigger that presses against the ground, releasing air from the pump to drive the legs. On the left, the Japan/US version, on the right, the Singapore/Australian version. Below left shows a stainless type screw with a washer as part of the assembly on the Singapore; the different ribbing on the rear leg is also visible, albeit blurry. On the right, the flat grey finished screw with no washer on the Japanese verion, and the more extensive ribbing.

Here's the Loomdorm instruction sheet, dated 1983 in California, which shows the Air Jammers style air pump:

And here's the Loomdorm box, with a comparison of what I thought was the standard Space Pets type pump with an Air Jammer pump, and the pump which came with the Loomdorm that matches the instruction sheet.