Another new one for the ever growing pile-up: Mark is floral resembling sunflower or perhaps daisy/chrysanthemum/other. The letter combo could be "AI" or "AL" (struck hard enough to ding the top outer-side).
French Shell Ball Foot: Maker ["A Sunflower I" in square]
Re: French Shell Ball Foot: Maker ["A Sunflower I" in square]
Ref.: une fleur