The serial number indicates the manufacturing year ends in a 2, but you have to deduce the decade. Peugeot was not making ATBs or hybrids in 1982 and unicrown forks didn't come into vogue until the late 1980s, so 1992 was the next possibility. Altus C10 was introduced for the 1993 model year, so that was a good fit for a 1993 model manufactured in late 1992.

I missed the 700C reference in your original post. That would make the equivalent US model a Panorma ($339 US), not a Dune. It was not unusual to have different model names for different markets, particularly when the country of origin was different. Most US market models during this era were made in Canada.