After WWII the Vallo Alpino near the Austrian border was modernised and incorporated in the new NATO defences against the East block. The new Vallo Alpino against Yugoslavian border incorporated turrets from old American M4 Sherman and M26 Pershing tanks, German MG-Panzerneste and even old turrets from the old Vallo Alpino.
The fort No. 1bis was modernised too. Cache is hidden at the entrance to the bunker. On the north side of the road (TRAILHEAD) you can still see a tank turret. This way the bunker was more effective and less vulnerable to the attack.