This M10000 engine is a possible preproduction sample; not for the M10000 but possibly for a Buck Rogers type toy using the M10000 power unit as a base. The detail of the side shows slots, holes and eyelets that do not show up in production examples.

Prototype M10000 Front

This front view of the engine shows the airsplitter. This is not a basement special. This piece required considerable skill and tooling to make.

Prototype M10000 Undercab

This view shows the attachment of the airsplitter, no simple task. The eylets used are consistent with Marx production.

Prototype M10000 Detail

This view shows the details of the side. Hole No. 1 is the same punching used in the boiler front, behind the marker lights on a 391. No.2 is an eyelet. No.3 is a slot for a tab. These three punchings might have been to attach a wing!

Can you imagine ... a Buck Rogers Train?

And we got that pathetic Mickey Mouse set instead!