In a web search, I researched how this photographic blending might have been performed in the 1880s. Basically, it was very difficult. Most wedding photos of the 1880s were single portraits as that period required long exposures, and people could not move sometimes up to 10 minutes, which led to stiff poses and a lack of a smile and was harder to do with two in the photo.
One technique in the 1880s to photograph a couple was to block the negative on one side and take the photo of one person with the non-blocked side of the negative. Then that part of the negative was blocked while the 2nd person sat down. What is astounding is how good it turned out. Since the background for both halves of this photo is identical, it had to be the same photographer.
And as noted in the “Matthew and Art Vanderkloot Portrait (circa late 1887),” the background of that portrait is identical to this combined portrait of Adrianus and Martha, suggesting not only the same year but also the same date. That is on or about December 26, 1887.
But because of the uncertainties, it would be helpful if the same portrait can be found which shows the name of the photographer and studio location and possibly a date on the back.
I have two copies of this portrait from different sources. The best is from the portrait Jeanne Jordan borrowed from either Harry Schodrof or Dick Denker in the late 1970s and had reproduced. If you would like to add information about the above portrait, please contact Dave Jordan, a great-grandson of Adrianus and Martha Vanderkloot. The Picture Reference Number is JCJ01.