Trap - Roy's 70" KS is 1959...
First and foremost is the frame or form a bow is built on.. Roy's bow is built on a 1959 form...
It has the 1959 riser configuration and the 1959 narrow grip...
Those things mentinoed above are permanent and not cosmetic.
Cosmetic features, such as serial numbers and coins can be anything, especially if the bow is made during the period when one year's model is transitioning to the next years model.
As I have said many times, anything could have been written on any bow by anyone at any point in time... There are dozens of reasons that a serial number might not fall in line with other 1959s... mismarked on purpose or by accident, refinished, not finished until later, special order, bow set back and found later, then finished with different number, and the list goes on and on. A bow like the 1959 KS with the flaired inset, could have been started and routed for the inset, then much later could have been completed.
If you can dream up a crazy reason for a mis-marked bow, it probably really happened.
The bows that do not fall in line with the other serial numbers, only prove the point that some bows were marked differently and all do not fall in line, which is the legitimate reason not to place much store in serial numbers for dating bows.
Truth is stranger than fiction. Odd things that happen in a factory environment are stranger than everyday life.
Talk with a retiree who worked in the same "built from scratch" manufacturing factory their entire life. They will tell you stories you never dreamed could be real about items that made it out the door as legitimate products and lunch box specials that went out the back door, or worst yet, stuff that was sold as scrap but purchased by employees who knew the products were really good.
Then talk with customer service or or the technical support personal who are out in the field and see the products that do no comply with with specifications and return those products to the factory and exchange them.