[GreenKeys] Model 15 serial numbers

[John Nagle]

> Date: Fri, 8 Jan 2016 11:00:40 -0500
> From: Henry Eck<wn3alx at gmail.com>
> To:greenkeys at mailman.qth.net
> Subject: [GreenKeys] Model 15 serial numbers
 >
> I have a model 15 RO (all but the outer case) with a plate on the left
> side of the page printer assembly which says "Property of The
> Associated Press", and a serial number plate on the lower right, #
> 97503.
>
> I wondered if there was any information to be had from the serial
> number, for instance the date/place of manufacture, etc. (?)

     Serial numbers on Model 15 machines seem not to be too useful.
The motor, keyboard, typing unit, and base are all easily 
interchangeable, and the big users (WU, AT&T, news services,
the military) often swapped those subunits in the field.
A used machine probably doesn't have its original subunits.
Many machines also have a property number, but that's not
manufacturing info.

     There are some variations which indicate age.  Wooden
rollers on the platen and a wooden paper spool hub indicate
older machines.

				John Nagle