Warren Baker provides this exhaustive commentary on J.J. Veldon in Marked Impressions (2006):

John J. Veldon, the marker of this coin, was a pharmacist in Quebec City. He was the son of James Veldon, also a pharmacist, who was born in Ireland in 1821 according to the Federal Census of 1881. The census of 1851, however, assigned the senior Veldon’s birthdate as being 1818. This would make more sense for, as Rulau states, based on information from Byron Johnson, James was married on June 13, 1837. John J. Veldon himself was born in Quebec in 1845. According to the Quebec Mercury of October 11, 1864, reporting on the meeting of the College of Physicians and Surgeons for Lower Canada, John J. Veldon was admitted to practice as a chemist, druggist and apothecary on that day. He is listed in directories in St. Roch, a borough of Quebec, from 1868 to 1897 on St. Joseph Street. John J. Veldon was well acquainted with the products of Devins & Bolton as evidenced by an ad prepared for the Montreal firm’s celebrated worm pastilles which appeared in the Courrier du Canada. Herein J.J. Veldon’s was one of the establishments endorsing the product. In another late 19th century prospectus for one of the quack companies called ‘Quickcure,’ a toothache remedy, J.J. Veldon is one of several Quebecc druggists giving an affirmative testimonial to the product: My customers always come again for ‘Quickcure,’ as nothing else stops pain so quickly.

This two-line mark is strongly impressed, except for the first J in the initial, which is barely visible, though the period right of it is apparent. It appears vertically on the obverse of an 1856 Nova Scotia penny, Breton-875, NS-6A1, in well-circulated condition. According to Brunk, the Veldon mark is also known on an Irish halfpenny and on a blank or worn Canadian copper, which formed part of the Joseph Foster and Richard Cooper collections. A rare and interesting countermark.

Ex: Paul Koppenhaver (8/1982), lot 408; Don Partrick. Original collector’s ticket included.