Qfwfq told us about this the other day and now the Brooklyn Eagle makes it official:
Brooklyn Eagle: Montague’s Oldest Store…: James Weir Floral Co. is vacating 160 Montague where it has been since at least before World War II. The date of its founding is obscure, but it may well be a century old — the oldest surviving business in the same location on Montague Street. This is month it is moving across the street to 155 Montague’s lower level space recently vacated by Artesana Home furnishings. Earlier this was an office of Liberty Travel for a dozen years. But before that the Foffé family had a Continental restaurant there.