This is the Master Airscrew Razor Plane from Windsor Propeller Company.
FEATURES: Engineered to use a special .017" x 1-3/4" blade.
The cutting depth can be set accurately and rigidly.
For balsa wood.
It rounds and smoothes the contours of cowlings and fuselages, shapes
edges and thins strips.
It uses a heavy duty industrial grade cutting blade.
Blade is replacable (MASR1520).
It's unconditionally guaranteed for a period of 5 years.
INCLUDES: One Razor Plane
REQUIRES: For Storage: lightly oil blade
SPECS: Size: 3" x 2"
COMMENTS: Some experimentation may be necessary to learn the cutting technique
used by experienced craftsmen.