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 5999-01-423-8982
NSN 5930-00-212-8866
NSN 5915-01-196-9426
NSN 6130-01-624-7207
NSN 5935-00-350-2028
NSN 5965-01-392-1761
NSN 5835-01-442-6482
NSN 6240-01-559-0684
NSN 4140-00-269-8545
NSN 5998-00-933-4164
NSN 6135-00-471-5356
NSN 5965-01-633-8849