A friend of my mothers husband recently died and he had a few Marklin engines.
This one is a convertable and can also be mounted horizontally on the base but all the convertables that I can see on teh net ( No 401 & No 402) have two bosses near the chimney set at angles, this just has one central boss for the safety.
So any idea of the age and model number, the trademark has teh Cei on on elevel and not underlined and there is a number 5 stamped in the top left of teh plaque.



Thanks, Jason