1981 - a bad year for watches?

[BobToc]

I've set up an email alert on Chrono24 for all watches from 1981 in the hope that something interesting eventually comes up. For some reason 95%+ of the watches are Rolexes. Is there some reason why they're so prolific in the early 80s? Was hoping to find an Omega, IWC or JLC, but without success.