I can recall seeing references for some quite obscure and specialist accessories for the original Rolleiflex....as Michel Hardy-Vallee says above, they were used for a lot of purposes other than in more everyday contexts. There was a complete underwater housing for a Rollei, with outside controls for settings and winding on. I assume that you had to come out of the sea and dry the salt water off the unit every time you needed to change film. Wonder how many of those F & H made...