Stamp: France–Canada joint commemorative issue, face value 30 francs. Issued 09.07.1955. The stamp depicts the three‑masted naval vessel “La Capricieuse”, commemorating the 100th anniversary (1855–1955) of the diplomatic voyage to Canada.
Postmark: Commemorative circular cancellation from La Rochelle, reading: FRANCE–CANADA / 9 JUIL. 55 / LA ROCHELLE. This is a "First Day" (Premier Jour) cancel, confirming the exact date of the stamp's issue.
Postcard: Illustrated maritime postcard showing “La Capricieuse” sailing. Edition G. Parison & B. Regnier
Concordance
Thematic: Excellent. The postcard features a 19th‑century sailing ship, which perfectly matches the corvette La Capricieuse depicted on the stamp. The commemorative cancel ties both elements together by celebrating the maritime historic event.
Geographic: Very good. La Rochelle is one of France’s most historically significant Atlantic maritime ports, providing a legitimate maritime context for a naval‑themed issue and a coherent link to the French port of departure.
Temporal: Excellent. The date of the cancellation (9 July 1955) matches the exact day of issue of the France–Canada commemorative stamp, ensuring full compliance with maximaphilic contemporaneity rules.