No other part numbers with same form, fit, and function found.
An inkwell-like item with a cover, used as a reservoir for lubricating oil.
NSN 6320-00-731-6134
NSN 6240-01-123-8822
NSN 6135-00-321-6707
NSN 6610-01-518-6696
NSN 6685-00-406-8171
NSN 5950-01-399-7728
NSN 7035-01-383-9357
NSN 6110-00-409-7019
NSN 5930-01-634-0659
NSN 5996-00-824-2167
NSN 6105-01-217-0119
NSN 5905-01-332-3660