For sale is a collectible Thimble Drone model engine. There is no indication on the engine but I think this is an .049.

This engine does turn over nicely and appears to be in good condition. The cooling vanes on the engine appear to be in good condition they are not bent.  The fuel adjustment value works.  On the back part of the engine it says Made in the USA.   Missing is one of the screws on the back part of the engine (see photos). 

Great engine for a collector of model engines.