[Maciej Góralczyk]

Solution is simple: 'White 12' is an A-8 from 739xxx batch. The camouflage fits the late Ago 190s style more or less too. It is the aircraft seen in Jonathan's post: http://forum.12oclockhigh.net/showpo...01&postcount=4
(note the final version of the outer gun bay cover)
Compare with this photo published in Aero Journal 04 and 49:
https://abload.de/img/aerojournalnew49p.47lafk6.jpg