The Overland Cafe (or Syl's Overland Cafe) was at 1719 - 7th St. from 1923 to 1957, run by Sylvester Sims. 1
Not much is known about the Overland, but it appears in the Green Book from at least 1939 to 1955.
Link's and References
Rites Held for Sylvester Sims Oakland Tribune December 19, 1963