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 5920-01-571-8027
NSN 5990-01-487-0871
NSN 6130-01-426-8841
NSN 6620-00-257-2783
NSN 4140-01-392-1542
NSN 5930-01-516-6108
NSN 5965-01-518-0623
NSN 6105-01-133-8460
NSN 6145-01-422-3006
NSN 5935-01-009-9956
NSN 5950-00-067-5787
NSN 5975-01-136-4359