[GreenKeys] M15

[Thomas Tillson via GreenKeys]

As an aside - I also found from 1954 a mod kit (115843) "TO PROVIDE  
EXPERIMENTAL OPERATION OF TYPING REPERFORATORS AT 100 WORDS PER MINUTE (FOR NAVY  
& SIGNAL CORPS)"
 
Lots of parts changes - mostly springs and felts.
 
TT
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