The story goes that this is the model that Eric Malins saw and decided he could do better, which led to the Mamod SR1.
The boiler is about 4" long x 1 1/4" diameter, located inside an outer casing, 1 5/8" diameter. The original meths burner is missing but I have acquired a new replica.
Steam is fed directly to the top of the port face block of a single acting oscillating cylinder. The cylinder is 13/32" bore x 11/16" stroke. The crankshaft has a small disk crank at one end and a 1 7/8" diameter mazac flywheel at the other. The flywheel incorporates an 11/32" pulley, which drives the near side wheel through a spring type drive band. The wheel is 3" diameter. The front roll is 1 5/8" diameter x 2" wide, split in two halves in the traditional manner.
As acquired, the Mazac flywheel was suffering major rot, which was fouling the wheel, preventing it running. The safety valve was seized solid. A new flywheel has been made in aluminium and I have repaired the safety valve, fabricating a new plunger. The paintwork appears to be original but is flaking badly. The wheels and bodywork are aluminium, which doesn't take paint too well. The original meths burner is missing but I have acquired a new replica. The last photo on the left shows the condition of the original flywheel.