A bit about the caboose and cupola
Before delving into the different Atlas caboose body styles, here’s some background information on this type of train car. Introduced in the 1840s, the caboose became a fixture at the rear of freight trains traveling across America. It functioned as a conductor’s “rolling office” as well as sleeping and cooking quarters for the rear train crew. Tools and supplies (lanterns, flags, and oil cans) were also stored in these cars. The cupola portion (small window projection) of the caboose’s roof was introduced in the 1890s and created to help the rear train crew (conductor, brakemen and flagman) observe their train in motion. This lookout post made it possible to spot shifted freight loads, damaged or dragging equipment or cargo and overheating axles.
The "35" series "End" Cupola Caboose is an early Atlas body style introduced in 1967. Its cupola is located towards one end of the body hence the nickname "End Cupola Caboose." This body style has a roofwalk. It has five windows on one side and three on the other as well as two separated windows on each side of the Cupola. It has ladders on each end, which do NOT loop over the ends onto the roof. This body style represents the "low budget" offering. It is an older tooling and lacks windows and hence is cheaper to manufacture than the more modern body styles.
This model does not have a series number as it was only produced in 1969 by Rivarossi under contract with Atlas. There are only 7 different models that used this mold, though Atlas item #2435 comes in a bunch of different variations. It is clearly distinguishable from the other models in that it does not have a cupola.
Atlas released the "30" series extended vision caboose in 1996. This model is very similar to the "43" series cupola caboose in most respects. It can be easily distinguished from the standard cupola caboose in that the cupola is wider than the body on the "30" series - hence the name "Extended Vision." This model may or may not have "loop-over" ladders and a roof-walk.
The Atlas "43" series cupola caboose has been around since the early 2000's. Essentially it is the same body style as the "30" series with the cupola located slightly off-center. The primary difference is that the sides of the standard cupola are flush with the sides of the body of the car. It carries three windows on each body side, two larger ones at the ends and a smaller one in the middle. The cupola carries a double-window on each side. Just like the "30" series, this body sometimes has a raised roof-walk and "loop-over" ladders but not always.
Atlas introduced the "33" series caboose in 2004. Their cupola may be found in the center of the body, and they feature two windows on each side supplemented by two separated windows on each side of the cupola. They are hard to distinguish from the "39" series C&O cabooses, but the NE-6's are shorter and the cupola has three panels on the roof. Furthermore, the cupola on the NE-6 is more squat than the one on the C&O.
Atlas introduced this model in 2008. The "39" Series caboose carries a cupola almost in the exact middle of the body. It does NOT have a raised roofwalk like the NE-6. It does have ladders that "loop over" the roof. It carries two large windows on each side as well as two separated smaller windows on each side of the cupola. The smokestack is taller than the one on the NE-6.