These seem to be quite old and show a bit of loving over the years, serial number is 407. They work and sound great. The ear pads look to be original and should be replaced with new bowls (I can order new ones for $20 shipped for you if you wish). The wood and lettering look pretty good and the headband is from when Grado's leather headbands were of better quality than they are today. The paper pizza box has seen better days but is relatively intact, the back of the box shows specs for the Grado lineup including the sr-40 which is kind of neat.
I am looking for $315 shipped CONUS.