B-17G Cockpit Auxiliary Window F-105 Thunderchief See photo of a similar

See photo of a similar antenna mounted to the fuselage of a B-24 bomber

NAS Coco Solo housed several Patrol/Patrol Bomber aircraft during its tenure

The horizon sphere rotates freely

Here is a  Rapid Response Rate of Climb / Vertical Speed Indicator

B-17G Cockpit Auxiliary Window F-105 Thunderchief See photo of a similarThis is a front left auxiliary cockpit window installed in some G model B 17's, although they could be retrofitted to other models. They could be opened inward to allow a pilot to de ice his main windscreen or, in the worst case, to see forward if the main screen was iced over. The internally facing, botton mounted handle unlocks when flipped up, and then the opened window would be affixed to the internal cockpit ceiling with the snap fit strap.