This is a WWII-era Pitot Tube, AN5816-2, as used by aircraft of the US Army Air Force and US Navy, such as bombers B-24 Liberator, B-25 Mitchell, B-26 Marauder, and A-26 Invader, fighters P-39 Airacobra, P-40 Warhawk, and P-47 Thunderbolt, dive bomber SBD Dauntless, and torpedo bomber TBM Avenger (see illustration from