I recently acquired this item. Return address is Nome, Alaska, marked Pacific Coast Steamship Co. Steamer SENATOR on 2 October 1908. Double struck Seattle, Washington; in the first strike the date slugs apparently had not been inserted, which was corrected on the second strike to show Nov 2 1908. There is no evidence of a stamp anywhere on the cover and the smudge in the upper right is not consistent with removal as part of the machine cancel would have to be missing.
The back shows setoff of similar machine cancels, plus a receiving stamp for Waldo Oregon.
Based on this, my theory is that the sender, though from Nome, boarded somewhere else in Alaska (PCSC did not serve Nome), and the steamship company bulk paid for this cover and others at Seattle, permitting its customers not to use stamps as a courtesy. The rear setoff indicates that a stack of covers was machine canceled at once in Seattle and the USPO had accepted postage payment in some other manner from PCSC.
Can anyone confirm or debunk this theory?
thanks,
Chris

