This image is unsigned but has Otto's distinctive writing. He took many photos of the Golden Potlatch parades held from 1911 to 1913; not all of them were signed.
This image shows the parade's king and queen, Edgar D'Oro and Daphne, riding in an automobile with a sign saying "Queen's Car" on the windshield.
Blotches on the image are probably due to problems when printing it in the darkroom.
King Edgar also appears in Image 862 (862 - King Edgar D'Oro on His Throne Seattle) and Image 888 (888 - King Edgar Ariving from Alaska); Queen Daphne also appears in Image 861 (861 - Queen Daphne on Her Throne).