The picture looks like Afrika Korps with Rommel and the desert background and the uniforms the tankers are wearing. There were only two Panzer Divisions there. The 15th Division used a single digit numbering system often with a playing card symbol like the Ace of Spades. The 21st Panzer Division often used a 3 digit system. The 221 is probably red with a white outline and is probably Tank No. 1, 2nd Zug, 2nd Kompanie, I Battalion, Panzer Regiment 5, 21st Panzer Division. What we can't see is the white palm tree Afrika Korps symbol or the yellow symbol of the 21st which resembles a "B"
Terry