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Patented by R.A. Hunter, 1937. As photos show, this teargas grenade was actually made, but it is unknown if it was adopted by anyone. It might have stayed experimental only.
The body is constructed of aluminum and measures approximately 3 5/8 Inches in diameter.

It has eight emission ports, the exterior has traces of gray colour paint and the primer in the firing assembly is a W.R.A. Mark V.

Photos © Frank.






This grenade was an unknown one for quite some time.
Fortunately J.Marc came with the proper identification because of the following US patent :