[GreenKeys] Western Union tape transmitter 22-A by J H Bunnell

[jag]

 Hi folks.
 
This is my first ever post and I was wondering if you could help me... I have acquired a tape transmitter but know very little about it... Any information would be helpful. Its made by J H Bunnell for the Western Union company. The model number is 22-A. I believe its dated around 1920 - 1930. The serial number on the item is 80.
What could it have used for? Were they widely used in the UK? Armed forces usage? I purchased the item in north Wales as it intrigued me as to its history and use.
 
Thanks in advance.
 
Jag
 		 	   		  
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