10pcs Ivory Vintage Style Barrel Guitar AMP Knob Amplifier Knobs – Big River Hardware
Collings Guitars and Mandolins - A quilt top I35 Deluxe in "Caramel" - The Ivoroid pickguard, knobs and pickup rings are custom made here in our shop just for these guitars! | Facebook
Waverly Guitar Tuners with Ivoroid Knobs for Solid Pegheads - StewMac
Gotoh Classical Guitar Tuners, with Ivoroid Knobs : Amazon.ca: Musical Instruments, Stage & Studio