No other part numbers with same form, fit, and function found.
A sighting device consisting of (1) a string and a web belt which is attached to the outside of the muzzle end of the tube, or (2) a disk, with a central peephole, which is inserted in the bore, or (3) a short piece of tubing, with cross lines, which is inserted in the bore of a cannon.
NSN 7035-01-386-5722
NSN 5975-00-978-2531
NSN 4140-01-139-4877
NSN 5910-00-686-2375
NSN 6220-01-413-2248
NSN 6610-01-133-2602
NSN 6110-00-480-4827
NSN 6110-01-420-4284
NSN 5996-01-398-4755
NSN 7035-00-421-8710
NSN 6620-01-633-8443
NSN 7035-00-763-6180