Finally cracked the CCB mystery! It was Coulter Copper & Brass Company, Limited!
"The 1914-18 war revolutionized the business. The company switched to munitions manufacture, making heavy outlays for machinery for which it was feared, initially, that no use would be found after the war. In fact, however, the plant was rapidly converted to peacetime production of automotive parts, which by 1929 represented the major part of production.
In 1928, following the sale of the Booth family's interests to members of the Coulter family, the company name was changed to Coulter Copper & Brass Co., Limited. In the course of time, technological changes caused coppersmithing to become "metaIsmithing," due to the rapid evolution of new metal alloys which began to replace copper on certain jobs."