B-6sb Switcher Steam Engines
The extremely rare #263 was made in 1957 with the PRR logo, but
without the words "American Flyer Lines" found on later models.
I am told it was probably a production sample that was never mass produced.
The rare #21004 Pennsy switcher was made only in 1957.  It appeared in some catalogs as #263 or #21005.
(Picture courtesy of Ed Church.)
Here are the undersides of the engine and tender.
(Photos courtesy of
Stout Auctions.)
The #21004 was used in only two sets, the #20315 Keystone Rocket and its export version #20916.  The only difference is the 220V transformer in the export set.  Both sets pulled the #969 Rocket Launcher, #805 PRR Gondola, and #806 Caboose.

A pre-production prototype of the #21004 was made with a white stripe on the running boar.
Even more rare than the #21004 is the #21005 Pennsy switcher made only in 1958.
It has a white stripe on the running board.
(Photos from an ebay auction by
The engine has a unique back to hide and protect the reversing unit which is in the cab rather than the tender.
Here are the undersides of the engine and tender.
(Photos courtesy of
Stout Auctions.)
It was used in only one set, the #20425, pulling the #25045 Rocket Launcher,
Floodlight Car, and #24626 Caboose.
(Photo courtesy of the MW Collection.)

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F-9 Diesel Engines    GE EP-5 Electrics      Handcars

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