This is a lesser known horizontal engine from Marvindustries (Robert Fulton Line). I don't think it has a model name/number. There is also an even rarer Sterno heated version
The boiler is electrically heated with a 115 V element with a 3 core rubber covered cable. (This is a replacement; the original being a 2 core fabric covered cable.) It is mounted in a cast mazac base and is of steel construction; 2 1/2" diameter x 5 3/4" long, with a longitudinal seam. It has a safety valve, whistle, steam dome and dummy chimney on the top and a tube type water level sight glass on one end.
The engine bracket is mounted directly on the side of the boiler. The double acting oscillating cylinder is approx 1/2" bore x 5/8" stroke, cast in mazac. The crank shaft runs in a tube through the boiler. It has a 2 5/8" mazac flywheel on the other end.
General condition is fair. There is some surface rust on the boiler but the paintwork appears to be original. The safety valve looks like a new replacement.
I have replaced the 2 core cable with a 3 core one. I have also replaced the warped cardboard internal baseplate with a more substantial stainless steel one.