All Rose Pickups are Hand Wound.
We occasionally make our bobbins in house. There is zero tonal difference between a store bought bobbin and our in house CNC bobbins. Our 100% made in the U.S.A. line uses Phenolic Resin Impregnated Paper from WilsonArt, while store bought uses Rubber Impregnated Paper, also known as Forbon. Both materials have been around for decades.
Making Custom bobbins on our CNC allows complete control of volume and design. We can make our own styles if needed, such as the one of a kind Rose Picasso. This also means we do not rely on third parties for bobbins.