During the early days of talkies the production team would often have three different takes of each scene because the camera equipment was so expensive. During the editing process they would use the best take for the American release with the second best take being used for the British or United Kingdom release and the least favorite take being used for the international release and this version is from the international release. If you watch the US version you will see that this version is mildly longer than the US version because during the editing process they gave more attention to the cuts and if you look at the same scene you will see that there are minor differences. You'll also notice that some scenes have different camera angles.
This is a digitally remastered from a copy that was sent to what eventually became East Germany after WWII. The East German government gifted it back to the United States in the 1970's and was stored at the Congressional Library in Washington D.C.
The movie is based on a 1928 play of the same name and has been remade several times. This is the first film version of the movie and it was remade in 1940 as "His Girl Friday" (also in the Public Domain) staring Cary Grant and Rosalind Russell. That version did a gender swap on Hildy portraying the role as a female and ex-wife of Walter with very minor changes made to the plot and dialogue.
In 1974 the movie was remade and returned to the origin material with Jack Lemmon and
Walter Matthau playing Hildy and Walter respectively with Billy Wilder directing (and in my opinion definitely worth watching).
Another version of the play was released in 1988 called "Switching Channels" but altered to reflect the plot of "His Girl Friday" as with everyone employed as TV journalists rather than News paper journalists and stared Kathleen Turner and Burt Reynolds.