The original grips were a (very!) sturdy black resin material, and required considerable effort to remove. Although the handles were pinned, the pins were just for show -- the resin material had been poured in place around the tangs of the two knives. As you can see in the center photo, the tangs are minimal. The least amount of metal needed to secure the handles, and even with the handles poured in place, there was rust creeping under and corroding the metal.
The Wiltshire Eversharp knife system relies on the black cases (you can see in the third photo), which have a spring loaded button to lock the blades in safely, as well as a crossed pair of ceramic hones. Each time the knife is drawn or returned to the case, it gets a pass between the stones, which keeps them sharp and ready to use. The system is great as long as there are no nicks or irregularities in the edge. Once the blade acquires any kind of feature, it will catch on the ceramic bars, and the irregularity will be magnified over time.
Part of this rehandle project was taking these knives to Cody to get the edges smoothed down, back to a clean cutting edge, free of nicks and notches.
With new handles and newly true cutting edges, my customer now has a pair of completely refurbished kitchen knives, for less than the price of buying a single new knife.