What do I have?

Got this from my wife`s step-father who was a WW2 Army vet. It`s clearly a torpedo model made of solid steel and is surprisingly heavy. Very well made and I don`t think it was made as a toy. Perhaps a training/identification aid?

I`ve looked at all types of torpedo photos on the internet and haven`t been able to narrow it down. Reason I specified Army vet is that he had a brother who was a WW2 Navy vet so it would make sense that he may have gotten it from him. Any further?

 

Thanks, OpanaPointer, I looked around on there but most were pics of various machinery that counter rotated.
Hopefully, someone else will see this and offer some other pointers.

 

It may be built around the material itself...(I hope it isn’t ‘warm’) : )

 

Modelling is or was a big deal in Naval Architecture. This could be a proof of concept or patent model. Then again it could be a presentation piece. Or just a bored MM on a long cruise. The crude attachments of the fins,points to the later.

 

Model of a memorial torpedo in honor of the WW II submarine force? Michigan has one like it.