A Dear Doctor distant French cousin sent from Tangier (1953). It's an oversize card, 180x110 mm:
Plasmarine is a mineral supplement, still being sold.
Comparatively dull view considering the red and black ad
The same basic postcard was used on exactly the same date with the same franking to French addressees, for Amora, a maker of mustard and other food items. Of course, it has a different message signed "Amora", so assume the receiver would recognize the name immediately. This product also still exists.