firstly Mamod 1953 SE2 last of the flat based SE2 engines

Mamod SE2 1954 first of the raised based SE2 engines

Mamod SE3 twin cylinder made approx late 1960's

Mamod SE2a reversable version of the SE2 steam engine. 1970's

Mamod SP4 Griffin & George steam engine. These were made for use in schools (and not that many make it out) and are no different to standard SP4's except the Griffin and george badge on the base. made 1990's