Oxygen Flow Indicator, MK III, British Royal Air Force, 1942 A-26 not surprisingly

not surprisingly

Type 98 Reconnaissance Seaplane Aichi E11A Laura

it is marked for the Inboard fuel tank

For example

Oxygen Flow Indicator, MK III, British Royal Air Force, 1942 A-26 not surprisinglyHere is a WWII era artifact: an Oxygen Flow Indicator, Mk III, Stores Reference 6D 430. Multi crew RAF aircraft had these installed at crew stations, such as gun turrets, radio operator, navigator, etc., to indicate the gross flow (not the precise rate) of oxygen from the primary oxygen tanks (not portables) to the local junction at each station. Commonly used in aircraft such as the Lancaster, Wellington, Stirling, Mosquito, etc. The serial number on