Hi,

c/n 2216 is a MiG-21U-400 (Bulgarian AF s/n 01, mfd 15/12/1965)
c/n 2320 is a MiG-21U-600 (Algerian AF s/n FC-80 / 2320)

Can I assume that the first Moscow built MiG-21U-600 aircraft were bulit in the beginning of January 1966 and start at c/n 2316


Rgd,
Jeroen Nijmeijer
Holland