We know of one possible O.T. Frasch image in the range from 470 to 479. It is unsigned and shows Mt. Tacoma (Mt. Rainier). The caption, especially the image number, is written in a style reminiscent of Otto's, but none of Otto's other photos use the name Mt. Tacoma. Thus this photo may have been taken and printed by someone else.
474 - A Storm on Mt. TacomaA selected image from the range 470-479: