Where to buy a cigarette case in 1930s Shanghai?

Somehow, along the way, as the world lost class, smokers started just leaving their fags in the packs. Of course back in the 1930s no self respecting smoker would have been without a rather nice cigarette case – Shanghailanders of course included. Where did they get them? Alexander Clark’s at Sassoon House at No.20 the Bund  (basically the shopping arcade at the base of the Cathay Hotel) was one place….