This motor is a single speed version of the Model 10.

There aren't many of these around. (Probably everyone wanted the 5 speed.)

This is the only one that I have ever seen with a decal on it that proves what it is!

CAILLE JUNIOR "TELLS":

1. not 5 speed
2. traditional RBM shaped gearbox
3. poppet behind carb
4. barrel carb
5. Eisemann on flywheel
6. plug in end of mag lever
7. serial number begins with D