Badge of a Best Medical Nurse, 4th Main Agency, Ministry of Health of USSR, circa late 1960s - mid-1970s.
Brass gilt, enamels. Very large size, 55.4 x 27.4 mm badge of superb quality. Reverse shows raised logo "MMD" of the Moscow Mint.
Excellent condition. Note, the Fourth Agency ran the special "closed" medical facilities treating the Soviet party elite (this explains the exceptional quality of the badge).