This is the interior of the rear (student or solo) cockpit of De Havilland Tiger Moth RCAF 4882, CF-TBS.    The circular black object at camera centre is a Morse Code key.  The black object to the right of "CF-TBS" above the Morse Code key is a night light.   All pilots, navigators, wireless operators were required to know Morse Code.   This unit keyed signal lights on the aircraft.    CF-TBS won the Outstanding Open Cockpit Biplane Award at Oshkosh 2008, and is completely airworthy.  CF-TBS courtesy of Tom Dietrich, Tiger Boys Aircraft Works. DH82C4 from No. 1 SFTS Camp Borden.
<a href="//commons.wikimedia.org/wiki/User:SteveTheAirman" title="User:SteveTheAirman">J. S. Bond</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>