Hardened case for the slit light ophthalmic end item nsn 6540-01-520-7942. Found in army assemblage n315, medical materiel set eye exam clinic: depmeds
NSN 5835-01-462-5983
NSN 2925-00-862-8550
NSN 6650-00-578-6543
NSN 4140-01-275-6963
NSN 6650-01-656-3301
NSN 5996-00-737-0646
NSN 5996-00-969-9882
NSN 5990-01-054-3332
NSN 6150-00-630-7302
NSN 5950-01-346-4141
NSN 5895-00-525-3295
NSN 6150-00-657-4759