I wasn’t entirely sure where to place this thread so I apologise if it is not in the right location.
This relic is an Argentine rocket launcher sight from an Instalaza 90? from memory. There was originally an illuminated range graticle on the lens which lit when a battery power was attached, the small bulb had long since blown. As I understand it these weapons were originally imported from Spain to Argentina, the camouflage paint so typical of Argentine vehicles and heavy equipment is still clearly visible.

Falklands war relic Instalaza launcher sight.

Falklands war relic Instalaza launcher sight.