Fowler 52-664-009-0, 10x Pocket Optical Comparator Set with 9 Recticles: Optical Inspection Apparatus: Amazon.com: Industrial & Scientific
Accuproducts International - Peak optical comparator
20 inch Optical Comparator OGP Model QL20S with Di Plus Vision Computer 5 Positions Turret with 100X - 50X - 20X - 10X Lens and Collimation Assistance Lens, 8 inch x 32