In mid 1929 the USSR agreed to buy 72,000 assembled or "knocked down" (K.D.) Ford cars, trucks, parts and equipment from Ford USA and would assemble them in one of two assembly plants: Moscow and Nizhny Novgorod. Those assembly plants started assembling Ford Model A's from US imported parts, in February 1930.
(Note that the GAZ factory in Nizhny Novgorod did not open for production until 1932.)
So the Ford Model A's in this picture are most likely some of those Ford Model A's that were imported from the USA either pre-assembled or as K.D. and then assembled in Russia.
By the way, that contract between Ford and the USSR was signed on 31 May (yesterday) 1929.
Brad in Maryland