Original U.S. M63 Anti-Aircraft Ground Mount for M2 Browning .50 Caliber Heavy Machine Gun 21st Century The suspension indicates it is

The suspension indicates it is a size 57 cm

and Chinese fighting forces in the CBI included the Chinese Expeditionary Force

The last picture is definitely the best and shows the original owner of the album in uniform wearing a clearly USCG marked M1 helmet with a Hawley liner

and measures 37" overall

Original U.S. M63 Anti-Aircraft Ground Mount for M2 Browning .50 Caliber Heavy Machine Gun 21st Century The suspension indicates it isOriginal Item: Only One Available. This is an absolutely original U. S. manufactured, M 63 Anti Aircraft Ground Mount for the standard U. S. M2 Browning . 50 caliber heavy machine gun. These were used to mount the M2 on the ground for use in an anti aircraft role, as the M3 tripod was unsuitable for this. Likewise, the M 63 is not the most stable at lower angle fire. This mount can also be used with the M1919A4 . 30 cal Browning light machine gun