Great comebacks and comments - THANKS, Guys.
OK, some more info. When I stated flawless workmanship, I meant only that, not necessarily the design or engineering.
The parts slip together smooth-as-silk and there are no marks or burrs anywhere.
Like any good engineer, I took it apart.
You're correct - the carb is a snug slip fit into the front section. A set screw should be installed.
The pipe slips into the front section and threading in the glowplug captures it.
The glowplug has the element pulled out to, I assume, get it into the combustion chamber.
There is a very interesting reed valve arrangement, as shown in the photo.
There is a screen just aft of the reed valve which may act as a combustion catalyst (Remember the Coleman catalytic heaters?)
It has not been run - the apparent discoloration is due to my poor photographic skills.
The engine was in a private collection for most of its life.
A MIG?
How about an F-86?
Bob Z.
Bob Z.