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scott brockelmanthe cabinet is the same photo used for the the E107 card, I would assume chickering issued this even though the mount does not have an imprint, It is from the 1899 team photo session that Chickering did.
Chickering did not do the Harvard photos, Pach Brothers did all of the Yale, Princeton, Harvard photos, yearbook and otherwise, they had a studio set up at each campus.
Scott