If I recall correctly, this access lid is on Jefferson or Martin Luther King down around 10th Street. It belonged to the San Francisco Gas & Electric Company, which was in existence from 1896 to 1906. SFG&E merged with the California Gas and Electric Corporation to form Pacific Gas & Electric, still in business today as PG&E.
The company opened a gas manufacturing plant in Oakland in 1905, down where Howard Terminal is today.
The six cleverly placed lifting holes are a nice touch.
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