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 6110-01-578-5481
NSN 6110-00-141-1966
NSN 5905-01-249-3144
NSN 6145-00-919-4232
NSN 5985-01-463-9112
NSN 5999-01-444-1791
NSN 5915-01-660-9299
NSN 5930-00-170-9224
NSN 6610-00-948-6244
NSN 5975-00-966-1500
NSN 5945-01-421-4135
NSN 5855-00-560-0110