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 6145-01-224-7228
NSN 5920-01-529-4196
NSN 6150-01-486-4474
NSN 6645-00-796-7206
NSN 6620-00-635-7347
NSN 6150-00-950-9330
NSN 6135-01-546-4588
NSN 6105-01-172-1802
NSN 5999-01-330-7697
NSN 5975-01-198-7178
NSN 5999-01-398-7291
NSN 5960-01-468-3727