The maker of this wonderful pop-pop boat is unknown, which is a pity. It was advertised in 1946 with the sole distributor being stated as being Eisenmann & Co Ltd. but the maker is not identified.
Most of the boat is made of aluminium, which was available cheaply just after WW2. It has a diaphragm type boiler, which appears to be made of brass. Unusually, it has only one tube leading to the stern, but this is quite large diameter compared with most pop-pop boats. The instructions on the box don't mention pre-filling the tube with water as is usual with pop-pop boats.