Langworthy owned the mold but the chips were made at The Burt Co in Maine.
Langworthy bought the blanks and hot stamped them. Any HHR inlayed chips were made at Burt and shipped to Langworthy.

Burt did not and would not Hot Stamp chips.

ASM bought out the Burt molds roughly 1988.

"I know the newer ASM Horseheads can't be Hot Stamped."
Why would you say that? No reason they could not be hot stamped.