Bauer clockwork 8mm camera with single lens and a built in light meter. Typical of the solid, mechanical cameras that were the mainstay of regular 8mm movie making.
Eumig clockwork 8mm camera in the same style as the Bauer above.
Bolex clockwork 8mm camera.
This model has two lens, usually a normal and telephoto. Accurate focussing and adjustments had to made.
Bolex were the top end of the amateur regular 8mm range,
Yashica clockwork 8mm camera.
This has a typical three turret lens. They are not primary lens but secondary lens that move in front of a fixed standard primary. This was an economical way of getting wide, normal and telephot lens on a basic camera.