Interesting how the Hippo looks bigger then the Mountain. Also interesting is the new postwar apartment and the old steam locomotive juxtaposition. I would have given anything to live there then.
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This front end view shows how much the 'M' and 'I' classes were related. While the I1 class was built first, the PRR engineers used the I1 boiler to create the 'M' class. The M1a received a bigger combustion chamber and internal steam delivery pipes, but the two classes shared quite a few other similarities as seen here like pilot mounted air tanks and bar pilots. Thanks for sharing another classic Pennsy steam photo!
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| Posted by on February 3, 2013 | |
The engine on the right is not an M1a. Not with that number.
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You are absolutely right. The circular number plate would identify the locomotive to be a L1s Mikado. All M Class engines had Keystone number plates. Thanks for the correction.
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John....The very first M1 (#4700) was originally issued with a circular number plate (reference used, "Pennsy Power" by Al Staufer). Keystone number plates were intially designated for passenger locomotives and circular number plates were for freight locomotives. Keystone number plates were added to the 'M' class because they were initially designed to be dual service (passenger and freight). The front end of an 'L' and 'M' can be confused because the 'L' and 'M' class locomotives both have the horizontal air tank mounted on their pilots. However, most 'M' class locomotives received the heavy solid drop pilots. Definitely a good test for Pennsy fans. Thanks for sharing.
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Jeff,I am glad someone knows what the number plates are all about.
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