Circa late 1940s/early 1950s. Mixed media on board. Comprising three maquettes from a presumed unrealized Northwest Airlines ad campaign, featuring the slogan "Transportation Down the Years", above a soaring Boeing 377 Stratocruiser. In custom portfolio composed of two 20 x 15 in. boards; main image painted on one board, two other smaller images matted and mounted to other board. Portfolio: 30 x 20 in. (762 x 508 mm); images: 12 x 18 in. (304 x 457 mm), 6 x 9 in. (152 x 228 mm), 3 x 4 1/2 in. (76 x 114 mm).