--ORIGINAL WORLD WAR II UNITED STATES MARINE CORPS RESERVE MEMBERSHIP BUTTON LAPEL PIN, RARE PIN-BACK TYPE.
The USMCR button signifies membership in the USMC reserve whereas the USMCR honorable discharge button designates honorable discharge from (the) USNCR. Both buttons are to be worn only with civilian clothes." These buttons may be worn by officers on inactive duty retaining their commissions and enlisted men who have reenlisted in the reserve. The item also states that the button was "designed at the beginning of the war for men joining the reserves but remaining on inactive duty."