S&W grips with six extra cartridges

[RCS]

I can remember the armored car guards picking-up money with their S&W M&P revolvers with
these grips that held six extra rounds. Still being used in the 1960's and into the 70's.

Very difficult to find a pair of these grips now, they are still useful 458544585545856

[free1954]

wow. never seen one of those before.

[Allen]

Thanks for sharing.

[jjrothWA]

What is shown on the right grip, upper surface.

there is a Pat number on the trapdoor, withh Gary, Ind.

Maybe a logo ti the manufacturer??

[RCS]

The logo on the right grip is DUEL DUTY and the patent number is 2509553.