I'm trying to adjust to having a tenth-fret dot on my Eastman DM-1. All my previous guitars have had the dot on the ninth fret. Looking at the book, The Story Of Selmer-Maccaferri Guutars, I see various early models with both ninth and tenth fret dots (not on the same guitar, or course!).
Does anyone have some historical background to this?
And what's your preference, and why?