On the issue of long-term service of civil servants

[1812 Overture]

First of all, the badges I published are not my collection. I found it from the forum, I hope the collectors don’t want to be angry.

my question is：How does the Civil Service Long Service Medal calculate the time? I see that these medals in the World War I also have military long-term service medals. Then these people became the ones who did not participate in the war in the Second World War? In addition, can you provide some photos of long-term service medal winners?

I look forward to your reply. Thank you