Playmobil 1976 Western Union Fort Headquarters (nr 3419, 3806, 3773) or Western building (3422, 3423, 3424 etc.) custom "steel" window

Custom "steel" window with firing port/arrow slit for the 1976 Playmobil Fort Headquarters or most of the Playmobil 1976 Western buildings (such as nr 3421, 3422, 3423, 3424 and so on).