Interesting message Mangrove. It is guessing what sort of Caproni actually visited far off Finland, surely not the Caproni Ca.60 triple triplane flying boat. This one flew only very, very shortly and then crashed completely.
I think this will be one of the military Caproni triplanes which were civilian converted after the war.
This is a picture of it when a civilian Caproni triplane visited Amsterdam in 1919.
Kees