Press Wireless, or PreWi as most radiomen called it, was a major player in the point to point business with stations at several locations. They provided teletype, photo and voice program links. The PreWi station in the San Francisco area was located in Belmont, south of San Francisco. Another large station was on Long Island, NY, first at Hicksville, then at Brentwood. MRHS member Richard Dillman visited the transmitting Brentwood station and laments the fact that he has no photos from that visit.
The Belmont PreWi operation was absorbed by Globe Wireless when PreWi went out of business. Many of the Press Wireless PW-15 transmitters were moved from Belmont to the Globe transmitting site in Palo Alto, along with some PW-15s from Brentwood.
The MRHS recovered two PW-15 transmitters from the Globe Wireless transmitter site and installed them at Bolinas. One has been restored and is operating as a 12Mc transmitter for KSM. See the MRHS Projects section of this Web site for the story of the recovery of the PW-15s.
We have service reports from the ear just after Globe took over the PreWi point to point circuits. It's fascinating to read about the problems they had in the first person as written by the station technicians and engineers.