I obtained a map of a South-East SF Bay.
Officially it is Page 8 of San Francisco, Oakland, Fremont, Berkeley set, compiled by the Soviet Main Intelligence Department of General Staff (ГРУ ГШ) in 1976.
It has a few funny mistakes (e.g. SLAC is marked as an Industrial Enterprise). One thing baffled me seriously. An area enclosed between San Antonio Road and Castro Street, and El Camino Real and Alma Street, is marked as Castro City. The city of Mountain View, according to the map, is East of Castro Street.
Here is a relevant part:
The boldface at the top left says Кастро Сити (Castro City). The boldface at the bottom right says Маунтин Вью (Mountain View).
I know very well of a California Castro family. However I have never heard of a Castro City before. Can anybody shed some light?