The SNL G-166 lists the 'mirror - rear view - assembly' and cover under Group 2202 as:
G166-02-92252 . . . C124163
The cover is listed as:
G166-6241425 . . . B241425
The illustrations at 'A' and 'C' show the single mirror on the adjustable arm, appearing similar to the arm that exists on the Shilo museum T16 as posted earlier by Rob L.
See portions of that part here:
http://www.mapleleafup.net/forums/sh...11&postcount=3
and here:
http://www.mapleleafup.net/forums/sh...2&postcount=20
In addition to the TM and SNL publications, plus images in Nigel Watson's Universal Carriers Volume II, there are three (3) less detailed factory images on the CD from Clive's Service Publications factory photos.