Signal Electric
Telegraph Key

Wireless Spec. Apparatus
SE 68A Spark Key
1917

Brach J-7-A
Flame Proof Key
1921

Spark Key

Speed-X Spark Key

Signal Electric Spark Key

Type D Admiralty Key
Made for the British Navy by Marconi in 1917
Click here to see inside case

RCAF Key

Admiralty key
(Australia)

Expanse Key
(Australian)
~1919 

Early Australian Spark Key

Marconi Wireless Key
c.1912
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