Its an A4
THe A3 had a different antena mount on the tail.
And the a5 had an extension to the length of the nose right in front of the wing root leading edge.
Both had 151/20s on the inboard wing mounts.
The book that profile even identifies it as
Fw 190a-4 "Yellow 2", Flown by Oberfeldwebel Heinrish Sterr, 6./Jg74, circa March 1943
I assume that is a typo and they meant jg54..
But its on page 58 of Ospreys FW aces of the Eastern front
127 kills in the east. Dead to ponys vulching him in a month in the west...