Found in a mid 1930s American detective thriller, tipped in at the front (for exchange purposes) this flier for the Gibert Joseph (or Joseph Gibert) bookshop at 26 Boulevard St. Michel in the 5th arrondissement of Paris. It is still there at the same address with many books in languages other than French. The English language section is adequate but there are few rarities as there were in the past.
The curious thing in this ephemera is the notice 'Free Entrance' -- I can think of only one bookshop in the world that charges entry ($5) and that is run by a much arrested, deranged and violent bookseller in New Hampshire U.S.A. Possibly this is a mistranslation. The phone number has been changed by hand which might enable someone in the know to date it quite accurately. It looks like the 1950s. Until the advent of Shakespeare and Co., Gibert was the main source of used English books in Paris. Interestingly it also caters for the four other most wanted languages there, mostly because these are the nearest countries, although there has long been a large Russian community in Paris.