Hi, Wayne. Having looked again at the photos of Priller's 190, it must be an A5, as per the Hasegawa kit. The caption points out:- "...mottled rudder, and not yellow as often depicted in drawings of Priller's aircraft. The yellow rudder was...another of .....part of which is shown in the photograph...."
The aircraft refered to has the 'flat topped' number 13, but does not appear to have the playing card on the port side, although it is on the starboard side. The aircraft with the 'rounded' 13 has the card on the port side. However, what the author describes as a mottled rudder, on close inspection, could well be yellow, with the appearance of 'mottle' being caused by the different type of paint, on a fabric surface. The Werke numbers are not readable and, as you pointed out, with research undertaken since this book was published, it could well be that it has been proven that this A/C had a yellow rudder. Personally, I think it has! The photo in qustion, if it's any help, is Archiv Nr. 298/1753/15, and it's one you might have seen, with Priller beside his BMW tourer, in front of the '190, outside a hanger.
Cheers! Terry.