OK I am gonna take this opportunity to knowledge grab ... I found a mystery loco a while back ...
I "think " it is probably something handmade by someone quite a few years ago , but aspects of it kind of give me pause ... I am thinking the flat slot machine screws probably date it pre-war, but it also has brass hex nuts they are mated to ?
The body looks kinda sorta reminiscent of a French Floor train , but the clockwork unit is something I have not seen the likes of , with a sliding forward and reverse gear set up actually on the final drive axle ?
Just wondering if any of you knowledgeable chaps have seen anything like it ...
For now I am classifying it as..... The Frankenloco!!!
Has not been cleaned or lubed so bear withthe grunge 
Non key side .. yet has a keyhole ( lol )
Keyed side with fixed ( screw on ) Key
Complete underview ( showing some soldering and re-used tinplate)
Sliding Gear Pinion
Engaged one direction ...
And the other ...
Over to you Gentlemen
