The traditional 501 has always been a favorite of mine.
The jeans I received are identical to previous 501's except for one thing:
The "rise", the distance betwen the crotch and the upper edge of the pants, is smaller than it has always been, by about 1/2 inch. It may seem as a small difference, but I noticed it right away, and then confirmed by taking a tape measure to my old 501's and this one.
This may not matter to some people, but it makes a difference to me.