Quote:
Originally Posted by qazxsw123
I would have thought "SEC T" was shortened version of secretary .
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Not when used with 'Normal' - the 'raised comma' indicates there are other letters.
The Part Number is 20/PBU/372 for 'Sec't' is shown on page 2 of
N diagram N849
And when you look at the diagram for Plan 12A
N4514 - extension plan with secrecy - you'll find the 20/DBU/372 listed amongst the components to be used.
I can't think of any arrangement where the term Secretary' was used in Extension Plans. The Plan 5, 7 105 and 107 were often referred to as a 'manager/secretary' arrangement but the buttons/switches are refer to 'main' or 'extension'.