Stamp on bottom of bullet

[kilgoretrout]

Has anyone seen a stamp on the lead bottom of a bullet? I recently had some bullets from WWI and the bottom have a P stamp that matched the casing stamp.

I attached the best pictures I could get i will try for better if wanted but wanted to see if anyone else has seen this.

 

[Alpini]

It's Polte in Magdeburg and it's absolutely normal.

 

[kilgoretrout]

It's Polte in Magdeburg and it's absolutely normal.

Thanks i found the manufacturer online but that was a first for me. All the bullets I've taken apart i haven't seen that before.