WE Bedroom Set (Princess Prototype)
©2002-15 paulf. All
This phone was on display at the November 2002 Hartford phone show.
I managed to get these few quick shots as the show was closing Friday
These units were used in Field Trials and differ from the later
On this page: Internals Instructions Colors
Return to the Development Timeline
||In all the photos I've seen in the past, it looked like the
prototype was about the same as the production model, except the switch
for the light was on the bottom front, instead of the later placement
on the back.
The standard G3 handset is used.
There's more to the story!
||The handgrip ridge goes all the way across the front and back
of the housing.
||The bottom plate is clearly different. The mat on the
bottom is larger, and there is a ringer adjustment -- but it's a
a mechanical lever. It's marked OFF - H - L..
The marking on the bottom is F-51910 (just above the "619").
||Looking from the side, the top surface is
clearly a sepatate piece that was glued on to the seperately-molded base
Looking inside (below), it's easy to see why. The dial is a
standard #6, and it's mounted just as in a 302 or 5302. It's
attached to the housing and connected by wires, not mounted to the
baseplate, as in the production version.
There is an interesting clear plastic window at the dial's 7 0'clock
position to let the light under the dial plate. The inside was
partially painted black to prevent the light from shining through the
The network coil is on the left. There
two circuit boards, containing the network and ringer circuitry.
coil on the right is apparently used in the ringing circuit. The
"ringing signal" comes from the handset receiver.
The hookswitch is grossly overdesigned.
Pushing on either arm activates the switch independently.
This is a mechanical "OR" gate for you logic fans. They
spent a lot of time cost-reducing this before production!
Note the "F" numbers on several of the internal
|The instruction sheet below was found folded
and tucked inside. Unfortunately, no wiring diagram was included!
The color codes were:
A - Aqua Blue
B - Rose Pink
C - White
D - Beige
|F-51910 BEDROOM SET
TRIAL INSTRUCTION NO. 101
ISSUE 2, MARCH 29, 1957
In 2013, a few friends
got together to compare notes.
Between us, we had four colors, including pink, aqua and beige from the
We didn't have a white set like number 619 above, but had several that
were definitely ivory.
All sets were dated in 1957.
Ivory was apparently added after the instructions were printed in March,
with found sets dated 7/57 and with relatively high numbers
between 1308 and 1409.