Posted by mmi16 on March 12, 2018  Is the oblong riveted area in back of the smoke box a patch on some previous problem? Posted by Bob Kise on March 13, 2018  mmi- I don't know. Posted by Bob Kise on March 13, 2018  If you look at photo 649418, there's a similar band on the next course back on the opposite side, 180 degrees from the one on this side. My guess is that it's a longitudinal seam reinforcement.

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