The Royal Society has made journal articles published more than 70 years ago open access.
Here's an excerpt from the announcement:
The Royal Society has today announced that its world-famous historical journal archive—which includes the first ever peer-reviewed scientific journal—has been made permanently free to access online.
Around 60,000 historical scientific papers are accessible via a fully searchable online archive, with papers published more than 70 years ago now becoming freely available.
The Royal Society is the world's oldest scientific publisher, with the first edition of Philosophical Transactions of the Royal Society appearing in 1665. . . .
The move is being made as part of the Royal Society's ongoing commitment to open access in scientific publishing. Opening of the archive is being timed to coincide with Open Access Week, and also comes soon after the Royal Society announced its first ever fully open access journal, Open Biology.