ROTTERDAM -- MAASTUNNEL/HARBOUR -- COLLECTION of 5 envelope folders containing photo cards of the 'Maastunnel'. (1940's). Each envelope contains 10 photos cards (partly leporello bound). c. 95 x 145 mm. In or. printed envelopes. Added: 6 loose photo cards. -- COLLECTION of 6 envelope folders & 1 booklet containing photo cards/postcards of the Rotterdam harbour. (c. 1920-40). Each envelope contains 10 postcards, for the greater part leporello bound. c. 95 x 145 mm. In or. envelopes (6) & owrps. -- (11).