The Rolleicord was a Twin Lens Reflex camera series by German manufacturers Franke & Heidecke from 1933 to 1976.
The sketch above is based on my own K3D model from ’53 – ’54, given to me by my father-in-law. It still shoots amazing quality photographs, and luckily 120 film isn’t as hard to come by as I had feared.
For some reason I gave the sketch a “Rolleyflap” label.