I have found this picture of Sd.Kfz. 254, WH-616656, showing the unit symbol of the 15.PD, but cannot identify the number (or letter ?) below right of the tactical sign for a motorized artillery unit.
For me it looks like an "R" ? (= Regimentsstab ??)
But I want trust my eyes.
Can any one help me.
WH-616656 ended later up cannibalized in North Africa
Thanks in advance,