Carrier mirror stem

[Lynn Eades]

Richard, sorry, I mis understood what you were trying to say.
I assume (always dangerous) that the Brit ones were made and used, and that the Canadians opted to produce them as well.
The first 3 pics are of a North African Bring back (I was not top bidder) Of British origin. the last picture is of the two Argentinian Ebay ones bought. I cant remember the history of them , so assume later, Canadian, British or even maybe U.S manufacture? (I think they were T16 parts?)