Russian medal of Meritorious Test Navigator of the USSR
Extremely collectable badge was founded in 14.8.1958.
Overall, fine details of the artwork are very well preserved and demonstrate exceptional quality of the badge.
Reference: Dietrich Hertfurth. Sovjetishe Auszeichnungen.Catalogue, page 119, item 3.63, price 650 EURO.
Estimate price for that nice item is $15000 – $16000.