This is a photo taken by Frank Nowell, the official photographer for the 1909 World's Fair held in Seattle, the Alaska Yukon Pacific Exposition. Presumably Otto licensed it.
"Seattle" is misspelled in the title but not the signature.
Otto printed a version for the American Post Card Co. as well:
There are two other images numbered 25:
Reuse of image numbers and different image series make it difficult to know how many images Otto published.