[DonVoigt]

Uffe,
welcome to the forum.

Your Artillery luger would be worth $1000 or more in the US. Called a Lange Pistole 08 by the Germans, or LP 08 for short. Was likely captured, or found its way to Finland in WWII.

The date of original production should be on the top of the chamber - from 1914 to 1918.

The serial number could be from 1 to 9999, does not have to be four digits. The suffix letter is part of the serial number. First block had no suffix letter, the second had an "a", the third a "b" and so on. Some high production years they reached well into the alphabet.

Hope this helps.