Anne mentions that she saw the movie " Farmer takes a wife" 3 times , but the show takes place in 1933 , that particular movie didn't come out until 1935 .
While it is possible that 1934's The Gay Divorcee (1934) could have been seen at this time by the Waltons, it would be a stretch to think that 1936's Rose-Marie (1936), mentioned in Ann Harris' letter, had been released since it would mean that three years have passed in two episodes. Character Yancy Tucker reminds John Boy in episode 1.20 "The Deed" that it is 1933.
At 46:18 as Curtis gets into his vehicle you can see the back of what appears to be a station wagon parked behind his car.