Hi Gerben,
I do not have photos to compare directly the 06/73 frame against P08 standard.
Maybe the attached photos can help. The first one is a comparison between a Mauser commemorative LP08 wrt a commemorative P08 (available at page 43 of my book as well).
The second photo shows a Mauser Parabellum LP08, a cut away and standard LP08.
I hope these photos help.
Ciao
Mauro
P.S. Gerben may you post some photos of your intetresting 1972-and-a-half?