Hmm better go check the toilet too, guess that should be CW eh.
The type is kinda like a version. As the years went by Stanley made changes, usually for the worse in the latter years. Here is the best type study I have seen so far. All bench planes fit the study, meaning that a #2 through #8 type 15 will all have the same distinguishing characteristics. Have a look, its really neet to see how old your planes are, I was shocked that my #7 was over 100 years old. Kinda doubt any of my tailed tools will be functioning 100 years from now. Browse around on Rarebears site, he has a large amount of info on it, also check out his friends pages especially Cain's
Thanks Wayne. Found this site too which has some good info.
Plane Dating Flowchart