Donegan LP-4 OptiVisor® Glass Lens Plate, 2X Magnification at 10" Focal Length.
Donegan LP-5 Replacement Lens Plate for OptiVISOR
Donegan LP-7 Replacement Lens Plate for OptiVISOR, 2.75x at 6" Magnification
Donegan Optical. LP1 Optiloupe Magnifier for Optivisor, Adds 2.5X Magnification
Donegan Optical Fold Out Pocket Magnifying Glass Item V906 -Lot Of 5
Vintage Donegan Magnifier On Stand Black Magnifying Glass Lens
Donegan Vantage V388-1/2 Linen Tester, 8x Magnifier Lens, Black Enameled Brass????
