Hey Rat, here are a few obvious examples of applied tops.
Some aren't quite as obvious, but in these two examples, you can see in the top where the neck was separated from the blowpipe.
Some early tops are tooled, not in the sense of having been blown in a full height blowback mold where the top is actually part of the mold and tooled after removal from the mold and separation from the blowpipe, but where the bottle is separated from the blowpipe, then tooled by flaring in this case, or in others, rolled inwardly or outwardly.
Hope this helps, and I'm glad you've joined us and I enjoy seeing your enthusiasm as a new collector.
A Great Resource -- find many of your questioned answered here.
Originally Posted by Warf rat
Is a tooled neck and applied top the same thing?
I'm surprised no one has referred you to this site already; but if you are really eager to learn about identifying antique bottles chronologically, then you will be hard pressed to find a better resource.
Well take this into consideration as for sacristy of this new found design, I'm waiting to hear back on month code for my friends 1965, but the add I've shown is dated Feb. 1966... My stubby is dated...