I photographed a Fairchild Camera and timer button at the South Dakota Air Museum and another K-17 type camera at the Tillamook Air Museum.
Fairchild Camera
South Dakota Air Museum 2021
Fairchild K-17 Aviation Camera, 12-inch
Tillamook Air Museum 2021
K-17 Aviation Camera
Unmarked, but with the Recon version of the Grumman Panther, which used the K-17