thanks for reaching out Stewart, so glad you found us.
The letters WWL or W.W.Ltd in a punch box, represents William Wilkinson Ltd., a well known, reputable jeweller in London.
The Leopard's Head, indicates the item was authenticated at the Assay Office in London.
The date letter changes each year, so identifying this mark requires matching the font of the letter, the capitalisation or not, and the exact shape of the surrounding shield (i.e., is it a square, circle, or pointed shield).
