The style of ladies' shoulder seams changed dramatically in 1889, providing us today with a huge dating tool for old photos. In Victorian times a lady would keep as fashionable as possible, especially when having a portrait done, as being up-to-date was a social statement.
This lady is shown with the old style of shoulder seams, so before 1889. In fact her hairstyle is more in keeping with the mid 1870s, and so is what little we can see of the dress. Much too fiddly for the sleeker look of the 1880s.
Cheers,
China