Original U.S. Vietnam War INERT 81mm Mortar M301A3 Illumination Round with Deactivated Fuse - Dated 1972 Accessories Williamson would fly multiple missions

Williamson would fly multiple missions attacking the Japanese Fleet during the Battle of Midway and was reportedly the only surviving SBDU-3 Vindicator dive bomber pilot from the island after the battle

It took part in the battles around Budapest before retreating into Austria and taking part in the defence of Vienna

Mounted Riflemen followed in 1836 and 1846 respectively

There is also a bit of light oxidation and staining near the tip

From what remains it seems it was originally marked:-

Original U.S. Vietnam War INERT 81mm Mortar M301A3 Illumination Round with Deactivated Fuse - Dated 1972 Accessories Williamson would fly multiple missionsOriginal Item: Only One Available. This is a totally inert deactivated example of the 81mm M301A3 Illumination Mortar Round. The device has no explosive filling or charges and cannot be converted to be an explosive device. This is completely inert and in compliance with BATF guidelines on inert ordnance. Not Available For Export. The 81 mm Mortar Illumination Round is used for the illumination of target areas during night missions or low visibility