I have 1959 and 1960 C.P. Goerz American Optical Company price lists that show the Hypergon, Described as "Goerz Hypergon F:22 or F:32 Fixed Stop." "A special lens for mapping, plotting and rectifying equipment, for military and industrial applications." Available in focal lengths of 127, 135, and 168 mm. Focal lengths given only in millimeters; other lenses on this list have focal lengths in both inches and millimeters. And there's a note following: "Coverage 90º. Special sizes to order." No mention of being shutter mounted.
This is, of course, less coverage than is historically ascribed to the Hypergon. In my collection of C.P. Goerz American Optical Co./ Goerz Optical Co, Inc. literature, this is the only mention of the Hypergon. It's not in my copy of a 1938 Goerz catalog, nor in a circa mid 1950's Goerz brochure nor any of my later Goerz literature running up to 1970.
David