Contaflex interchangeable film backs

<p>In some searching of the 'net and this forum's archives, I've not found a definitive answer to this question: Do the Contaflex interchangeable film backs fit the Contaflex IV <em>specifically</em>?</p>

<p>I've seen references to them fitting the "Contaflex line" and opposing references that say they fit the Super B and a couple of other variants. Does someone have an accurate answer? I have learned the difference between Contaflex and Contarex backs.</p>

<p>Many thanks.</p>

<p>Unfortunately they only work on the later model cameras. Incidentally they are APITA to use, and apt to not be light tight. Sounds like a great idea, but in practice is a loser.</p>

<p>The magazine backs fit on the models that have a rapid-advance lever: Supers, Rapid and Prima.</p>