Knutsen Seattle Harp Guitar HGS8

In the Noe/Most book (left image), the tuners have been removed. In the right two pictures we see the original tuners - as Dan Most said, 7 on the neck. As in the other 7-string variations, the "g" string is doubled. Dan also stated that there are six bass strings. There are some marks on the front and back of the headstock that suggest a 6th tuner of some type may have been present at one time - but I suspect it was originally just the five strings, like all the harp guitars of this style. So, with one less bass string, and a doubled "g" string, this is really a standard 18-course instrument (rather than the 20 which the book leads one to believe).
Additional photos and information can be found in From Harp Guitars to the New Hawaiian Family by Noe & Most.

Knutsen Archives Inventory Number		HGS8
Category		Seattle Harp Guitars
Body Style		"Lower Bass Point"
Current or last known owner		Dan Most Estate
Year (approx)		1912
Label		"C. Knutsen, Sole Patentee of the 11-string harp guitar" in red letters
Label Code		SE2
Courses / Strings		18 course: 7 strings on neck (G doubled), 5 bass, 7 treble
Frets		straight
Scale length		unknown
Neck Joint		unknown
Woods	Top	black-painted spruce
	Back & Sides	mahogany
	Neck	unknown
	Fingerboard	walnut
	Bridge	walnut
	Headstock veneer	unknown
Binding, trim	Top	multi-colored wood
	Back	ivoroid
	Fingerboard	rope, ivoroid
	Headstock(s)	none
	Soundhole	rope
Inlay		fancy pearl fret markers, diamond in headstock
Pickguard		none
Comments		(Noe/Most, p.73)