Cassegrain is the last word on beautifully engraved cards and elegant French stationery. The desk accessories and inexpensive glass-nib writing pens make great gifts. Métro: Concorde. Other location: 81 rue des Sts-Pères, 6, St-Germain-des-Prés, PHONE: 01-42-22-04-76; Métro: Sèvres Babylone.