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City Park before being named Balboa Park.
Notice the bay is labeled "Gulf of San Diego".
Also notice where the street grid gets a little funky in the NE section of the map, where the city limits extended to at the time. That is present day Boundary St. I've always wondering what the boundary was referring to. Now I know.
Other maps from the time period refer to Baja California as "Lower California", you'd never see that today.
Tijuana as Tia Juana. (Which explains present day pronunciation with the addition of the first "a")
Present day Imperial Beach was Coronado Heights or South San Diego.
Another thing to note is that there are other maps out there that suggest the San Diego River may have emptied out in the San Diego Bay (under the airport) instead of the Pacific Ocean at Ocean Beach.