Interesting Chilean Uniforms

Chilean ceremonial uniforms generally represent periods of history when they were service uniforms. There are French style from the Pacific War and Prussian style from late 19th century. I'm unsure if these grey ones represent something which was once service uniform or an amalgam of periods. The equipment looks like late 19th century or early 20th century but the helmets look WW2.

In any case they would be easy to convert either from WW2 or colonial types given WW2 German  heads.

I'm tempted to make them but want to pin point an era to use them in an imagi-wars scenario.

I did some more research and the helmet was introduced to the Chilean military in 1937 ad was a service item. The white belts and pouches were probably just for parades. Also remarkable was just how wide spread the use of this helmet was in latin America from WW2 and even into late 20th century.