It is 1930s jetton: "Ready For Sanitary (Medical) Defence of USSR".
I can't see why this would have not been awarded to an ambulance driver.
Fellow collectors are NOT adversaries to be bested...
☭ "Ричик, я не понимаю, почему, почему ты тратишь деньги на эти вещи!" ☭
Thank you. are these common?