[Polar Bear (Diesel schooner) of San Francisco, Calif., mastered by Louis Lane, keeper Dunbar Lockwood Sr., on voyage 17 April 1913 – 11 November 1914],
![[Polar Bear (Diesel schooner) of San Francisco, Calif., mastered by Louis Lane, keeper Dunbar Lockwood Sr., on voyage 17 April 1913 – 11 November 1914],](https://archive.org/services/img/polarbeardiesels00pola)
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