Original British WWII Signal Lamp Daylight Short Range MkII with Morse Code Key Category_Lock Assembly What is significant

What is significant

copper securing rivets

With a loss of 3 degrees fahrenheit for every thousand feet of altitude

The canteen is maker marked and dated 1942 on the bottom and nicely marked with etchings throughout

Original British WWII Signal Lamp Daylight Short Range MkII with Morse Code Key Category_Lock Assembly What is significantOriginal Item: Only One Available. The Lamp, Electric, Signalling, Daylight, also called a Lucas Lamp, is a military signalling lamp used starting in the First World War and through until after the Second World War. The "Lucas Lamp" was invented by Oliver Lucas in 1916 and patented by him hence the use of the "O. L. Type" name sometimes found. While many of them were made by Joseph Lucas, Ltd., even those made by other companies were still "Lucas