Silk Edged Perfumed card

cm high by cm wide

The two cards above both have the printed " T.S. ", which defines them as being of Stevens manufacture.
At one time it was assumed the number printed on the card - 618 on the cards above - defined the card design. However, as can be seen in the two images above, these numbers are repeated on multiple different designs. The relevance of the number is hence unknown (unless perhaps it is a short hand for the artist/designer, rather than the design, for such as royalty payments).