THE LOST ZEPPELIN (1929) a Tiffany Studio release (who ever they were) features a typical service triangle with the romance of early aviation. Zeppelins (ie Dirigibles) were hot stuff at this time popularized by their successes during World War I (WWI) and commercial traffic developed by Germany postwar.
The best part of the film is the second half that concentrates on the Antartic flight of the titled character, it's wreck and the rescue of the survivors. There is some references to the disaster of the Scott expedition (1912) where the entire polar party died on the way back from the pole. For those unfamiliar with the story read the Roland Huntford book 'The Last Place on Earth' for the triumph of Amundsen and the defeat of Scott.
The film is technically adapt for the time but you can see the problem the actors where having with the early sound equipment. The actors freeze and will not move even their heads in case they miss their marks and the microphones. In many scenes voice overs were used to cover multiple actors. To show how fast things improved in just two (2) years watch DIRIGIBLE (1931) Columbia Pictures, Frank Capra directing. Pretty much the same stuff, romance triangle and Antartic expedition though this time with AeroPlanes (Ford TriMotor) and two (2) Zeppelins. Balloons, Blimps and other period aircraft were also featured. The picture benefits from two (2) years of technical advancements and we would rate it six (6) stars ******.