The Danish artillery was an early adopter of metallic-case handguns, taking on this pinfire 6-shot solid-frame revolver in 1865 - when most of the world was still using percussion firearms. The thousand guns made served well for many decades, until in 1897 they finally were recognized as obsolete and converted to use more modern centerfire ammunition. After that update, they continued to remain as issued sidearms until the end of World War 2!
The guns have a manual safety, an unusual (but not unheard of) element on a revolver. The centerfire ammunition they were converted to use is also an interesting subject, as it was a metal-jacketed but wood-cored projectile. Presumably, this was in an effort to get a high velocity and large diameter bullet simultaneously. The same type of bullet would be used in the .45 caliber Schouboe automatic pistols ( https://www.full30.com/video/9e08e89f2b288fb3af95af60ef28eab4 ).