Thanks on the 62. I thought it might be the color code. As such, have no idea when they changed out the 302 for the blue 500.
Just got out the box and looked at every bit of it. No markings of any kind anywhere except for as shown in the picture and the darker blue Tel Co Property tape seal that was broken when the box was opened.
The box, except for a few tears, is in great shape. No holes, dents or water marks.
So, not being up on release dates, I guess all I could say is the 302 was put into storage sometime after the 500DR, whatever that stood for, came out.
Will never know, but it is a great 302.