There are far too many of them out there to be considered salesman's samples or novelties as some people believe them to be.As proof that they were used, they do suffer damage, primarily about their mouth.The cause of this is because the washers were not used along with the screws, which means that the sole had to be drilled in order for the screws to seat.
There were some subtle differences in the dimensions, but only those that are significant are mentioned where appropriate.
Some of the bench planes are a bit longer/shorter, wider/narrower, heavier/lighter than what's noted for the fact that the planes used many patterns over their decades of production.
I'll occasionally slip into the Stanley mantra, and use their lingo, even when I know better that it's properly called an 'iron'.
This is the first plane of the Bailey series, which Stanley made into the world's standard plane configuration after they bought the patent rights to the design from Leonard Bailey, who was making the planes in relative obscurity in Boston, Massachusetts during the 1860's.
He was the undisputed champion of the plane slugfest that errupted in the decades after the Civil War.