[GreenKeys] CRYPTOGRAPHIC REMINDED ME OF THIS

[BOB LAAG]

JUST WONDERING IF ANY ONE KNOWS THE NAME OF OR HAS SEEN THE MACHINE USED 
WITH THE 5 CHAR GROUPS ENCRYPTED MESSAGES THAT  WERE ON THE SHORT-WAVE 
BANDS YEARS AGO???  WAS IT A MECHANICAL MACHINE OR SOME COMPUTERIZED 
UNIT???  JUST WONDERING...