Bruce, Hi, I have a Kingsbury in the same model as yours and I would be very surprised if yours was not build by Alden himself. The deck in question is certainly modified and to my eye the grain with all the variations ( particularly the blond streak ) as those in the untouched deck seem that were cut from the same board. And the patina seems to speak to the age of the redo. And I will bet they did not chamfer the under side of the front cutout as in the original. It seems the decks are beautifully humped as should be and the modified seems a perfect mate that I don't think the modifier would have been able or disposed to achieve. You comment regarding the design of the number 7 piqued my interest as I have a photo from Dave , Alden's #2 son, that shows the character of the letters and numbers used on the Kingsbury stems. ( My boat had the ID filed off as was often done by thieves, I guess , so I was happy to see the documentation )
As an Aside, I can find a pic if you would like , of my boat done and fitted for some dutiful high end attention to the purpose for which she ( the boat ) was built.
Have fun . Dave