You're right Vince. The two front ears of the TMH casing can be seen. I think that it is a multi-jig because at the rear, where the looped finger nut is, the rear head casing looks like it's being positioned ready for welding at the same time, which would make perfect sense.
You can shoot 'em with a £50 Thompson gun or a £2:7:6d Sten gun. But you can only kill someone so dead........
Don't you just love those Heydrich spectacles......?