/key_manipulating_ key.jpg
This is the fourth key designed and built by Marconi UK. It did not have a name or a model number and was identical to the one that was used on the Titanic.   (Photo by Lewis Bodkin)
This is a replica of the above key. (Photo by Lewis Bodkin)

key_manipulating_03 100_3999_s.jpg This image shows the principal parts of the Manipulating Key. Click on thumbnail to enlarge. (From Handbook Of Technical Instruction) 

Contributors and Credits:

1)  Lewis Bodkin  <05bodkin555(at)gmail,com>
2)  Wireless Telegraphists  by Hawkhead & Dowsett   1925

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Apr 17.18