J Class Changes
NW Mailing List
nw-mailing-list at nwhs.org
Mon Sep 1 21:25:08 EDT 2008
At some point, the earlier 1940s built Js, which were rated at 275lbs boiler pressure, were upgraded such that they were 300 lbs (610-613 were built that way).
Mark Peele
Catonsville, MD
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