Brian Rochon wrote:
"Today’s edition of the Erie Lackawanna E-Mail List Photo Archive (lists.railfan.net/erielack-photo) has four high resolution images of MC 46205, a wood-sheathed truss-rod box car, circa 1928-29."
Todd Sullivan replied:
"Ummm, in that era (1920s), I think MC is Michigan Central, part of the New York Central family, not Maine Central which has reporting marks MEC."
Todd is correct - the NYCL Oval and large "Michigan Central" reporting marks are dead giveaways.