@Will you are looking at a Marklin Storchenbein 11111 ( Stork Leg ) loco and tender released by Marklin to commemorate their 140th anniversary in 1999. It's a 1:1 replica of the first model locomotive Marklin made in 1892 ... lovely made model sadly let down by a woeful clockwork mechanism which only propelled it a short distance
I am pretty sure that @Jim Kelly-Evans has converted that one to electric drive as I am sure I have seen him post videos of it running and it was certainly going a LOT better than the miserable factory clockwork
You can see the mind numbing stellar performance in one of Fred's videos of a stock one
Yikes, I see that. A real wheezer. Cute loco though.