Aermonic Valve Port Hole

Aermonic Valve Port Hole

Aermonic Valve Window

No manufacturer’s name but the box is marked with ‘British Manufacture’.   Three versions of this valve window were available:

No.1 Polished aluminium with beaded rim, sunk gauze, 6d each

No.2 Nickel plated flat rim, tubular back with turnover lugs, 9d each

No.3 Nickel plated flat rim with two nuts, 9d each

The one pictured above is type No.1