Dave,
Of course I never said or would ever have thought that "customers of guns in the 18th century cared no more about what they bought than when buying a book." I did not say, at any point or in any fashion, that customers did not care about the gun that they bought. I wrote an article, for God's sake, about a customer who specified quite particularly the features he wanted on his rifle! I've said, repeatedly, that they would have cared about the difference between a common and a high-end rifle; many might have requested particular features (as Baer seems to have); they might certainly have negotiated about many things with a gunsmith; and of course they would have wanted a gun that "fit" them physically. Not sure why that isn't clear.
All I have said, repeatedly, is that I do not believe that customers cared at all about the stock profiles (Lancaster v. Northampton, for instance) that some of us think are so obvious. That is all I have said.
My point is that those things were not visible or significant to eighteenth-century American customers. There is no evidence that anybody noticed them.
If, in the British gun trade, customers requested German or Spanish or French fashions, then I guess the differences between those things were more noticeable than the difference between a Lancaster County and a Lehigh County gun.
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The reason whether people noticed stock profiles matters is because this is how people have explained the signed Albrecht rifle. It has a Lancaster profile because he had to adjust his practice to tailor it to the Lancaster clientele. I don't believe that, because I don't think any customer would have cared a whit about a stock profile.