Legislative Route Number 141 was a State Highway and western bypass of the city of Bakersfield which existed before the 1964 California State Highway Renumbering. Legislative Route Number 141 was brought into the State Highway System during 1933 and never was assigned a Sign State Route. At it's fullest extent Legislative Route Number 141 began from US Route 99 at Golden State Avenue and followed Pierce Road, Rosedale Highway, Oak Street and Brundage Lane to US Route 99-399 at Union Avenue. Elements of Legislative Route Number 141 were incorporated into the US Route 99 and California State Route 58 bypasses of downtown Bakersfield. Above as the blog cover Legislative Route Number 141 via the then new Oak Street Overhead can be seen as it was during November 1939.
https://www.gribblenation.org/2023/01/pre-1964-legislative-route-number-141.html?m=1
The original definition of SR 204 (approved May 13, 1963 but not active until July 1, 1964) matched original LR 141:
QuoteRoute 204 is from:
(a) Route 99 to Route 58 near Bakersfield via Brundage Lane and Oak Street.
(b) Route 58 northerly to Route 99 near Beardsley School.
Both definitions were amended July 17, 1963 (1963 c. 1698), since the new LR 4/SR 99 freeway had been built.