The carriage was patterned after a 1903 Oldsmobile

The carriage colors are Red and Yellow

Each carriage carries 6 passengers

Carriages were designed by Bob Gurr

Required an "A" ticket in 1956-1957

Required a "B" ticket in 1959

Required an "A" ticket in 1964-1965

From Main Street Vehicles Story Guide 1966:
The horseless carriages are sometimes called the "1903's," but you could pick any year —04,-05 or -06 and be just as accurate. These little cars are of WED "composite" design. On the basis of extensive research, Studio designers created a horseless carriage which was a composite of the design and size of many gas-driven cars of that early period in automobile history. And our Horseless Carriages are a little bit of everything. The two-cylinder engines are actually not auto engines, but have the horsepower, the sound —and even a slight case of the shakes —as did the originals. WED designers selected today's most efficient two-cylinder water pump engine. Some of the external parts, such as lights, are authentic.

From WED Disneyland Dictionary 1968
"put-puts" of 1903 vintage complete with fringed canvas tops, make trips between Town Square and the Plaza.