Hi Pavel,
Weston, Ontario is very close to Downsview, site of de Havilland Canada and RCAF Station Downsview. Both are part of Toronto today. The present boundaries are a little vague, but I think a Torontonian today might say Downsview is in the Weston neighbourhood.
1 Supply Depot was located in Weston in the 1950s (and maybe earlier), and was a major logistics facility for the RCAF in central Canada by then. It moved to Montreal in the 1960s. I think it was the forerunner of No. 25 CFSD, still there a few years ago. There was a 1 SD badge on sale on E-Bay a little while ago.
There was an ITS at Mountain View in 1947, don't have any more information. By then it may have been the only one left in the RCAF, and may not have had a number.
Hopefully Dakota has more info on No. 1 SD and the ITS.
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