"What would a box of this in good shape with all 50 rounds be worth?"
Here are some full boxes that I have picked up over the past few years.
The Green Remington "Dog Bone" boxes have a Railroad stamp on the back from 1935.
I have no idea the age of the Winchester and Peters Boxes.
$20.00 is the most I have ever paid for any of the full 38 Special boxes.
http://smith-wessonforum.com/attachm...1&d=1394336233
http://smith-wessonforum.com/attachm...1&d=1394336241
Jim R