In the Russian files released in 2025, there's an image of Oswald's 1962 residence permit (page 306 of the PDF), which has a stamp on it which appears to show that he married Marina in 1960, not 1961.
And perhaps coincidentally, in the Russian version of Oleg Nechiporenko's book Passport To Assassination, he quotes from a 1964 report allegedly written by the heads of the First and Second Chief Directorates, containing a list of the documents to be transferred to the Americans relating to the Oswalds. That 1962 residence permit, along with its predecessor, are included on the list. But in the earlier, English version of Nechiporenko's book, which is very different, those two residence permits are missing from that list. They're also missing from the list allegedly included in the Central Committee decree of 23 April 1964, No. 71 in the Russian files.
As far as I know, the 1962 residence permit was released for the first time in 2025.