This receiver is a rare find. It is the Collins
75S-2 receiver with the additional fourteen 200kc bands and switching and
crystal bank features like those on the 75S-3C. Very few of these receivers
were made from 1958 to 1961 during the production of the 75S-1s. There were
modification kits available during this time to convert 75S-1s to 75S-2s.
This receiver is one of the original Factory 75S-2s as indicated by the
solid white band markings on the pre-selector control and the serial number
plate. These Factory 75S-2s were sold to government and commercial users.
Not many Factory 75S-2s were originally purchased by amateur radio operators.
The frequency crystals and the BFO crystals are stamped early 1960, indicating
that this is a fairly late production unit. Although some of the 75S-1s
had CW filters installed at the factory, this receiver does not have the
CW filter installed nor is there any indication that one was ever installed.