[GreenKeys] Dates can be found on some keyboards

[Jerry Murphy]

Greenkeyers:

If you were wondering when your Model 28 or 35 keyboard was made, you
can find an ink-stamped date that is visible on the underside of the
keyboard.  I looked at a M28 ASR keyboard that is out of its cabinet.
Remove the motor and the intermediate gear assembly.  Remove the 154085
plate from the underside of the base.  (The intermediate gear assembly 
is fastened to the 154085 plate and allows the front to back adjustment.)
The mounting plate may be different if you have a sound reduction
intermediate gear assembly or a gear shift.  You should see an ink
stamped date from the spot where the 154085 plate was removed.  The date
on my keyboard is "AUG 17 1965."  My guess would be that the stamped 
date signifies when the sheet metal base was made and not when the
keyboard was assembled.  But that's just my guess.  The ID tag on the
keyboard identifies it as an LAK4 ARP, S/N 70257.  The Bell System calls
this a 28B Perforator Transmitter Base.  I looked at another base and
there was a faint but unreadable fragment of a stamp.  It's possible
that a cleaning of the base wiped out the ink stamped date.  If you
have your keyboard out of the cabinet, a look at the date on the base
might be informative.

Jerry Murphy