35mm slide in cardboard sleeve. Depicts a piece of machinery by a large window in a factory building. Recto captions, printed in blue- top left: "date," right side: "made in Canada," left side: "Patented," bottom edge: "Project from this side arrow shows position." REcto inscriptions, top edge: "Welding boom (I.M.A.) used by westeel Regina, Feb '57." Verso captions, printed in blue- top centre: "Mitchell Photo Supply Ltd. Dominion Sq., Montreal," bottom centre: "Processed by Etco."