S O N VINTAGE on Twitter: "1930s Air Ministry morse lamp by Aldis. £60. #militaria #lighting #vintage https://t.co/7h6eRe8Nlc" / Twitter
![A WWII Air Ministry issued Aldis Signal lamp, 5A/760, dated 1939, serial 1878, complete with original electrical cord and original Air Ministry-issue box A WWII Air Ministry issued Aldis Signal lamp, 5A/760, dated 1939, serial 1878, complete with original electrical cord and original Air Ministry-issue box](https://auctions.specialauctionservices.com/images/lot/7766/77668_0.jpg?1615217290)
A WWII Air Ministry issued Aldis Signal lamp, 5A/760, dated 1939, serial 1878, complete with original electrical cord and original Air Ministry-issue box
![air traffic control - What is the meaning of a flashing white signalling light in Aldis Lamp? - Aviation Stack Exchange air traffic control - What is the meaning of a flashing white signalling light in Aldis Lamp? - Aviation Stack Exchange](https://i.stack.imgur.com/h3Al9.jpg)