Pending Richard's reply, I recall that the two types were always kept
separated at Waverley Depot, and the Westinghouse cars were kept
semi-permanently coupled and restricted to broken shift working (hence
the B on the windscreens).

However the "last coupled set of P cars" tours in October 1960 used
1493 and 1707, which would seem to have been a "mixed" set.

IIRC one of the prototype Ps had GE gear, the other Westinghouse, but
neither had MU capability.

----- Original Message -----
From:TramsDownUnder@...
To:
Cc:
Sent:Wed, 26 Apr 2017 18:21:11 +1000
Subject:RE: [TramsDownUnder] Re: GE's first project in Australia

Hi Richard,

Could the last group of Sydney P cars with Westinghouse control be
coupled and worked with the majority which had GE PC5 control ?

Noel Reed.

FROM:TramsDownUnder@...
[mailto:TramsDownUnder@yahoogroups.com]
SENT: Wednesday, 26 April 2017 5:56 PM
TO:TramsDownUnder@...
SUBJECT: [TramsDownUnder] Re: GE's first project in Australia [1
Attachment]

 For further understanding of GE P C control here is  a 1926
brochure.

This should clarify the application and operation of each
controller type.

Richard C