1929 only with the black roof, note that the roof and the wheels are actually American Flyer in origin

This same car with a red rounded roof usually indicates 1930, although the only set to use these yellow cars in 1930 showed two No. 51 Chair Cars, this baggage does show up occasionally.

Only in 1930 this baggage was sold as part of the Seneca Set and was available for separate sale. This is the only 50 series baggage car to come with a door.

Although cataloged in three different sets in 1929 and one more in 1930 this car is probably from 1929 as it actually has the number on the car (see below)

This variation of the Canary Yellow chair car is probably from 1930 as the numbers are no longer lithographed on the car sides. Some cars can be found with one side without numbers and the other side with numbers. 

The Seneca Set from 1930 was a three car set but never had a 52 Parlor car, instead it had two different colored No. 51 Chair Cars this one is red / yellow and green. The one below is blue / yellow and orange.

Circa 1929 - This canary yellow Parlor Car came with a green roof and was sold in only one set. Very difficult car to find.