Nikon screen and ocular eyepiece tester for Nikon F

some Nikon camera dealers offered their customers this test unit in the shop, it is constructed to easily test different focusing screens and ocular eye pieces for a Nikon F, on a big wheel were mounted different eye pieces from +2.00 to -4.00 dpt and on two rails were mounted different focusing screens, now the customer could view through a real Nikon F eyelevel finder and find out his optimum eye piece and his focusing screen, it comes in outstanding fine condition and complete in two maker’s boxes