Frankly, I can't tell any difference in the two boxes from your picture. The toning was probably caused by some environmental factor, like smoking in the house or humidity.
Boxes look to be mid-1960's and certainly could have contained a Speedmaster. It is very difficult to match Omega boxes to a watch unless the box is specifically marked with the model name. The vast majority were not so marked and could have contained anything from a Constellation (most of these came in marked boxes, but not always) to a Ranchero (one of the least expensive Omegas of its time).
Hope this helps,
gatorcpa
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