. "1926Z"^^ . "1"^^ . "The Pennsylvania Railroad's class B1 comprised 42 switcher-type electric locomotives built between 1926 and 1935. They were of 0-6-0 wheel arrangement in the Whyte notation with 700 horsepower. As built, the first 28 locomotives in the 1926 order formed semi-permanently coupled pairs grouped in three classes. The first, class BB1, were AC powered and served as prototypes."@en . "2"^^ . "9.4488"^^ . "3"^^ . "PRR B1"@en . "4.572"^^ . . . "42"^^ . . "1935Z"^^ . .