I do not consider this Cornstick pan to be ASW/BSR.
Unknown maker.
As Tom stated above, the only 'Stock' # - Catalog number containing a "T" in/on a BSR/ASW Catalog or price sheet, is for a BSR Cornstick pan, Teflon Coated, beginning in 1966.
Furthermore, during the beginning time frame of BSR producing their "tea size" cornstick pan,(and other sizes), WAGNER still held the patent, and we KNOW with a high degree of certainty that ASW/BSR was not one to risk a patent violation / lawsuit.
If, in fact, you possess information that is 'proof' positive that this is an ASW/BSR produced item, I would be very interested in seeing it. :) :)