Can anyone please help with more information on the round pictured. The headstamp is P69 3 26 S if the picture is not clear. The X-Ray looks similar to the WW1 Incendiary Spitzgesschoss. I have checked both Kent and ‘Die Militarepatronen Kalibre7.9mm but can find no good matches. Any information, particularly about the production and use of such ammunition would be welcome.
Thanks in advance