I've noticed recently that the 600 series (at least, the 620 and 660) has changed shape.
The basic shape from the inception of the series in 1963 or thereabouts has a flattened bass horn and a long treble horn, almost like a 325. Also notice the extra strip of wood to the right of the guard.

The newer 600s - since about 2010, by my reckoning - have a thinner bass horn with a rounded top that sticks out more, and a shorter treble horn.

Now, you could say "there is no consistency, they have changed a bunch of times, etc." But I challenge you to find a shift in design as significant as this one throughout the many decades of production.
So the question is, which do you like better? My personal opinion is that the new design looks off-balance, but I wanted to hear what people think.
