Triplets? Not exactly. From outward appearances Doepke Bulldozers seemed to remain unchanged during their production run.
There were, however, three significant versions from their introduction in 1952 through 1956. The photos below illustrate their differences.
The D-6 Bulldozer was one of two Doepke toys built to 1:12 scale, the other being the #2006 Adams Road Grader.
The photo best illustrates the three versions of the Doepke D-6 Bulldozer.
The 1952 version uses a split center axle, the pivot axle for the blade, and a black spring track tensioner.
The 1953 version uses a full-length center axle and the black spring track tensioner.
The 1954-56 version uses a full-length center axle but omits the black spring track tensioner.
Another variation involves the background color of the “Caterpillar” decals. The early versions used a gold background, whereas the later versions used a yellow background.
A slight variation in the hue of the yellow plastic used to mold the engine blocks can also be detected in these photographs.
Version #1 – 1952
One view of the 1952 first-version bulldozer.
The bulldozer blade could be locked in three different positions. Only one “Model Toys” decal was used, always on the seat back.
Center blade pivot axle is split, using two separate short axles.
Track-tensioner spring. Note the slotted holes in the frame for the front track axle.
Version #2 – 1953
One view of the 1953 second-version bulldozer.
Notice the mini-catalog. 1953 was the first year the catalog covers were marked with the name of the toy.
The contents of the catalogs, however, were identical, unlike catalogs used in previous years.
The full-length blade pivot axle.
The track-tensioner spring remained on the 1953 version along with the slotted frame.
If you can find one at this price today, buy it.
The “C-3” code indicates this box was manufactured in 1953.