In what 8-bit character set is 0x9d meaningful?

Question

In what 8-bit ASCII-like character set for English is 0x9d meaningful? I'm cleaning up some old data files, and occasionally finding a 0x9d in otherwise-ASCII text. (No, it's not UTF-8.)

It's not valid in Windows-1252. The Python "latin-1" codec translates it to Unicode 0x9D, which is "Operating System Command". That makes little sense. In Unicode you get a box with [009d]. (In Python, you can convert anything to Latin-1 without errors being raised, but that doesn't mean it's meaningful to do so.)

Examples, with Python-type escapes, from a messy database I'm cleaning up that combines text from many sources:

Guitar Pro, JamPlay, RedBana\\\'s Audition,\x9d Doppleganger\x99s The Lounge\x9d or Heatwave Interactive\x99s Platinum Life Country,\\"

for example \\"I\\\'ve seen the bull run in Pamplona, Spain\x9d.\\" Everything

Netwise Depot is  a \\"One Stop Web Shop\\"\x9d that provides sustainable \\"green\\"\x9d living

are looking for a \\"Do It for Me\\"\x9d solution

From the context, I'd suspect ™ or ®. But what 8-bit code had those?