This was my first Marklin engine. I'm not 100% sure about the model number but it appears to be a 4105 or something very similar. The badge is marked with "6 1/2" but this is a size designation (=boiler diameter in cm) rather than a model number. A small and simple engine, by Marklin standards.
The boiler is a vertical type with a single centre flue. It is 97 mm high x 65 mm diameter. It is fired with a dual wick meths burner, but I don't think the one that came with it is original. The boiler is fitted with a chimney, which is also not original, a safety valve, which looks too new to be original, and a whistle. The steam feed pipe exits from the side of the boiler very near the top. The steam pipe goes directly to the rear of the port face of a single acting oscillating cylinder; 6 mm bore x 20 mm stroke. The crank shaft has a 73 mm diameter flywheel. The whole sits on a cast base with square corners. It is in pretty good condition, both mechanically and cosmetically. The paintwork and the boiler bluing appear to be original.| Make | Marklin |
| Model | 4105 size 6 1/2 |
| Made | c1920 |
| Description | Stationary steam engine |
| Cylinders | 1 |
| Cylinder Type | single acting |
| Piston Diam mm | 6 |
| Stroke mm | 20 |
| Valve Type | Oscillating cylinder |
| Boiler Type | Vertical with centre flue |
| Fuel | Meths |
| Mechanical Condition | Good |
| Cosmetic Condition | Good |
| Paintwork | Original |
| Packaging | |
| Purchased | 23/2/2016 |
| Purchase cost | £130 |
| Additional cost |