GTO (Ready for Labor and Defense), 1st level badge, 1946 - 1961 type, circa late 1940s- early 50s.
Silver-plated brass, enamels; 23.9 x 18.0 mm. Unusually nice piece with silver plating unlike the more common, later gilded version.
In excellent condition. Comes with screw plate marked "USSR Arts Fund" which is contemporary to the badge (although not necessarily original to it) and fits well.