I have over 8 of these available. From darker tones and more aged and a few screw-back types as well.
--ORIGINAL WORLD WAR II UNITED STATES NAVY RESERVE MEMBERSHIP BUTTON LAPEL PIN.
The USNR button signifies membership in the USNR reserve whereas the USNR honorable discharge button designates honorable discharge from (the) USNR. 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."