Wilfully and knowingly selling or procuring for sale or having in possession or under control for sale, directly or indirectly, by any person, partnership or corporation or subsidiary agency to his or its employes any article, material, product or merchandise of whatever nature, not of his or its own production, not handled in his or its regular course of trade or business, or not connected with or related to his or its trade or business, is unfair competition and is actionable at the suit of any person damaged thereby. Such action shall be in equity by injunction only, and no damages shall be assessed.