Greet's
Airbus A300 B4 FFCC (Forward Facing Crew Concept as opposed to Rear Facing Crew Concept, RFCC)
has a pull-out knob, which automatically sets standard setting.
It actually says "std std" on blue background, no numbers, nuttin'.So basically you assume there's 1013 behind there (naturally you x-check with the third alt), but who the farg knows!
Cheers !
Knowledge is powerrr...