CANADIAN INTERWAR WEBBING
Not many Canadian webbing collectors are aware that Canada began producing its own patterns of British webbing as early as 1924. These examples are invariably marked "G.-H.-G. LTD. 1924 - OTTAWA" and are quite rare. It is unclear if this company produced entire web sets or just replacement components, but Pattern 1908 Waist Belts, Water Bottle Carriers & Support Straps as well as Pattern 1919 Brace Attachments have been noted...
For years, this maker seemed quite elusive. Recently, however, the "sessional papers of the Dominion of Canada 1924" yielded a maker by the name of Grant-Holden-Graham, Limited, which fulfilled a number of orders for the Canadian Government in 1924.
http://archive.org/stream/n01p3sessionalpap60canauoft/n01p3sessionalpap60canauoft_djvu.txt
Among the various orders for awning repairs, clothing & Union Jacks, was an order listed as "...Great War Veterans' Association, Vancouver, band supplied for funeral of the late Sergt. T. Foster". Perhaps this was the order that required the webbing accoutrements in that year?
The following 1917 Grant-Holden-Graham, Limited catalog yields more details about the company including an address of "147 to 153 ALBERT ST., OTTAWA" as well as a branch factory at "43 MONTCALM ST., HULL, QUE."
http://www.scribd.com/doc/33874148/1917-Grant-Holden-Graham-Catalogue
The following are some pictures of the known pieces (note that one of the buckles on the water bottle carrier is on backwards)...
(Special thanks to 48th, who provided the pictures of the support straps!)