Willard P. Hawley, Jr. had previously operated KYG in Portland from 3/28/1922-10/13/1922 under a standard broadcast licence. The Radio Service Bureau's operation of the station, apparently under a temporary grant, was short-lived, and ended the next month.

The original scan for this advertisement is located at:
http://oregonnews.uoregon.edu/lccn/sn83045782/1922-10-22/ed-1/seq-78/.
 
Sunday (Portland) Oregonian, October 22, 1922, Section 5, page 8:
Radio Service Bureau advertisement for radio station KYG