The consistent use of Cdn made headgear I have in the uniforms groupings i my collection is the use of the Canadian khaki Beret. I believe all the groupings that would use this type of head gear included Cdn Examples. This does not hold true for my Armd Corps example with all but on grouping having black British made examples. ALL of my Scottish Regt groupings without exception contained British made Tams only. I have never had a grouping with a Cdn made tam however the Glens of the same grouping are Cdn Made. Don't know if any of this anecdotal evidence means anything at all scientifically but that is the evidence I've collected over the years.