Hi...
Apparently, VB+OP was a Focke-Wulf Fw58, and just for good measure, I checked VB+OF, but this was a Heinkel He45.
However, it seems that sometimes two aircraft ended up with the same code, for example, VB+PO was registered both for a Do17 and a Ju86.
All info from here:
www.luftwaffe-experten.org/stammkennzeichen.html
Regards...
Paul