The white spot above and right of the mountain might be a flaw on the negative or it might be the moon.
There are two versions of this image. The second version has the caption in the blank area at the bottom of the card, not in the image area. Also, the bottom of the card is black in the second version.
There is one other image numbered 101 (X101 - A.Y.P.E. Grounds from Universety). Reuse of image numbers and different image series make it difficult to know how many images Otto published.