This garment is a Royal Canadian Navy (RCN) Officer's Mess Dress Jacket with Waistcoat, a formal evening dress uniform traditionally worn for mess dinners, galas, and official ceremonies.
Key Characteristics & Features Design: A dark navy or black wool cropped, double-breasted dinner jacket featuring peak lapels and two rows of distinctive gold military buttons.
Rank Insignia: The gold lace rings with a circular top loop on the cuffs represent the traditional "executive curl," an identifier utilized by naval officers.
National Identifier: The subtle "CANADA" shoulder flashes sewn onto the upper sleeves confirm its specific origin with the Canadian Armed Forces.
Based on the visual design, construction, and insignias, this Jacket is most likely from the 1950s to early 1960s.
Size: approximately 38.