When did F-40 change over?

[Rayk]

It may have been posted late but it was definitely a

Excellent, Ralf. I sit corrected.

But of these changes, mostly the flat vs. round-bottom, is any of these more of a "grand auditorium" shape than any other? But, probably Ray was asking about that '73-'83 time period.

Taylor coined the Grand auditorium shape/Name . Unless I misread it’s been a while .
Basically the flat bottom or OOO/OM Body shape with 16” lower bout 41/2” or 4” to 3 3/4 or 3 1/2 inches in body depth . I just call it dread body depth . lol
But the mini jumbos have that body depth usually though I’m not familiar with all brands . Guilds are which we know. The name mini jumbo possibly is just because jumbos are round bottom . lol

 

[portsider]

Oh no, not that easy! Compare the body shapes! The 70's style was very different on the lower bout shape (mini jumbo).

1950's~1963 vs. 1972~1983 vs. 2006~2014:



Ralf

First glance, I thought the middle one looks like a "real" Guild. I'll stick with that.