Cameras like this Kodak were bought to capture mama in front of the Pisa or Eiffel tower and papa sleeping in the beach chair. The Kodak Retinette I B was manufactured in Germany and fitted with a Rodenstock Reomar f2.8/45 mm lens. The lens is built into the camera.The Kodak Retinette I B has an exposure meter and therefore it was on the top of the line in it's heydays.In those days the majority of the consumer cameras came without an exposure meter. The built in leaf shutter has speeds from 1/500 to 1/15 seconds and bulb.
