help for my P08

[leopard2a5]

Hello girls and boys.
firstly, I use google translator.
Once the matter, I have a P08 from 1910. with NO. 1229th besides that, there's no other stamps on it.
nothing in there, stamp 8.82 below the pipe, but assume that it is cal / measuring the pipe?
What can you say about this P08?
are there any lists that I can type no in and see more about it?
Who used it?

Best regards from Denmark.
leopard2a5.