I’d originally thought this session was from 1925, but I am now leaning towards 1927. Chaplin was in New York during both years (he was also there in 1923 but I don’t think these photos date back that far). The Chaplin archive website gives them a date of 1922 but I think that’s incorrect as well. I can’t find where photos from this session appear in magazines or newspaper articles any earlier than 1927. I also have a publicity photo for The Circus with a photo from this session which makes me think the later date is correct, although Chaplin was not against using old photos for publicity.