MS28042-1A, 18110-1, 2" Aircraft Instrument Mounting Ring / Clamp

MS28042-1A, 18110-1, 2" Aircraft Instrument Mounting Ring Clamp

640003, MS28042-1A, 2" Aircraft Instrument Mounting Clamp Ring

MS28042-1A, 5801-A, 2" Instrument Mounting Clamp Ring

MS28042-1A, 18110-1, New 2" Aircraft Instrument Mounting Ring Clamp

18110-1, MS28042-1A, 2" Aircraft Instrument Mounting Clamp Ring

MS28042-1A, NH1002261-10, 2" Instrument Mounting Clamp Ring

New Original Grumman AA-1 74 & on seat bottom stored in boxes since the 70’s