It has been in continuous production since then, and is nearly universally acclaimed as one of the finest small boats of all time [1][2][3][4][5] He was 66 years old by then, and had all the experience from a full and legendary career of designing and building yachts.
The Quincy Adams boats had hull numbers in the 2000s, and were planked with mahogany rather than the white cedar used by HMC.
Since Cape Cod's rights prohibit anyone else from using the trademarked named “Herreshoff 12½”, the boat is called Doughdish.
Bill Harding, the creator of the Doughdish, took great pains to ensure his boat was an exact replica of the original, even eschewing the weight reductions afforded by fiberglass construction to ensure the Doughdish is authentic in every way (other than building material).
In fact, the Doughdish is allowed to compete against the original wooden boats in association regattas, while the Cape Cod Shipbuilding 12½ is not.