It's actually the U-190, which saw service in the RCN as HMCS/M U190.
And this would explain the postmarks from two different vessels -- from the Montreal Gazette, 25 July 1945. The U190 was being escorted on a ceremonial tour of communities along the St. Lawrence River and Gulf of St. Lawrence, with stops in Montreal, Trois-Rivières, Quebec City, Gaspé, Pictou, and Sydney.
