The Boker emblems are not pinned in the handle scale. We have one pretty old and rare sample knife here, which has a pinned shield, but all knives from the last 20 years or longer have a glued shield.
We made some changes to the glue process, so usually, it´s older knives where the shield could come off, depending on the handle material.
All natural materials are more or less subject to shrinking etc., so this could cause a shield to come off.
The hole below the shield does not mean that a pin is to be used. The hole centers the tool when the emblem hole is milled, so it does not mean that there is (or was) a pin/rivet.