Pre-War German 37mm Pak 36 Casing Headstamps

[M8owner]

These were all found together in Russia. The primers are no longer live. Many have the same P131 number and are dated 1936. Does P131 designate the manufacturer? Also, I note these have an "*" after the 6331 case design number; does anyone know the meaning of that symbol. Another of the cases has a star after the 6331 number. Many of the composite steel/brass casings were found in this lot also. One brass casing does not have a date.

Thank you in advance for your comments.

Steve

 

[blackwatch]

P 131 = Deutsche Waffen -und Munitionfabriken A,-G., Berlin-Borsigwalde.(manufacturer)

Last photo. G = 1935 (date)