This is a used G-Mark 30RC engine for model airplanes.
The box propeller nut is missing.
A spinner nut is included instead.
It turns smoothly without sticking because it was sometimes rust-proofed with GUN OIL.
If you are a collector, please acquire it at this time.
The acrylic stand and propeller in the photo are not included.
Manufacturer: G-MARK
Model: TWIN CYLINDER 30 RC
Ignition method: glow
Color: Silver
Accessories: instruction manual (copy), spinner turning rod
Condition: Used