I'm in Breen's "Encyclopedia of US & Colonial Coins" looking at the 1864 "small motto" 2-Cent piece, Breen lists it as a prototype. How is that different from a pattern? Or is it just Breen's own goofy nomenclature for the early more rare example of the issue?
The difference might be because although the 64 small motto used a pattern die, it was released for use in commerce. Kind of like the Cheerios dollars. The reverse was a proposed or pattern die, but the coin was released and is normally referred to as having a prototype reverse design.
A prototype is an unrefined example, made while the product is still at the conceptual stage, and used to gain funding for taking the project to completion. A pattern is a more refined example of the product, perhaps multiple different examples, from which the final product design will be selected for development.
When does a prototype become a pattern and vice versa? I view patterns as unadopted designs, whereas prototypes are more of a developmental stage of a design that is a work in progress to adoption.
That makes sense to me in the normal English language usage of the two terms. I do not know if there is a special numismatic definition of prototype. Breen is full of good stuff, though he was known to kind of make up facts on the fly.
I own different coins that are bonafide patterns, ie some of the Judd pieces, and others that were apparently developmental pieces created to perfect the design. One of my favourites is a prototype Rosa Americana penny created in 1723. Having known Walter Breen, I rather prefer to disregard a lot of what he said, thought and acted. He was a brilliant person in knowledge, but a miserable existence otherwise.
I have heard the same from others who knew the man. I had a chance to acquire a handwritten manuscript of his. Normally I would have jumped at such a chance, but it was from his time he was in jail, and I just didn't want any part of that.
Someone in the coin club I was a member of had ridden to Los Angeles with Walter Breen and said he probably hadn't bathed since the Eisenhower years.
But when was that? I met Walter in 1985 and on several other occasions after that time and he had no hygiene issues then.
:goes off to Google Walter Breen: I was a great fan of Marion Zimmer Bradley in the 1980s. To find that she was married to one of the most-cited authorities in my current hobby, and then to learn all this other... stuff... I think I'll go sit and rock in a corner for a while.