Bob Chaparro wrote:
"Photo: NYC Gondola 329127 (1920)
Photo from the Milwaukee Public Library:
https://content.mpl.org/digital/collection/HstoricPho/id/4833/rec/30 

You previously posted this on March 3.


"Drop bottom design?"

Not exactly.  As I replied back on March 3, NYC 328000-329499, ex-LS&MS 51000-52499, Lot LS 86, 1,500 40 ft hopper bottom gons.
http://www.canadasouthern.com/caso/NYC-MODELS-FREIGHT2.htm   
http://www.canadasouthern.com/caso/images/lot-ls86.jpg  


"Partial view of Michigan Central gondola 7512 also."
MCRR 7500-7999, Lot 223-G, 500 35 ft 8 in wooden drop bottom gons in this series.  1,500 additional cars built for NYC&HR, LS&MS, and Big 4.
http://www.canadasouthern.com/caso/images/lot-223.jpg 
http://www.canadasouthern.com/caso/images/mcrr-7962.jpg  


Ben Hom