Caro, Alaska. Nov 11 1907 P.M.,, Helbock type 1 on registry return receipt to Tanana, Alaska, very fine, ex-Hall (Helbock RF 7) (Image)

CV.

Circle Alaska Dec 15 1905,, Helbock type 1 on UX18 to Ft. Sheridan, Illinois, very fine (Helbock RF 6) (Image)

CV.

Circle Alaska Nov 28 1906,, Helbock type 1 on registry return receipt to Fairbanks, Alaska, filling punches, very fine (Helbock RF 6) (Image)

CV.

Cleary, Alaska. July 1 P.M. 1907,, Helbock type 1 on registry return receipt to Tanana, Alaska, very fine (Helbock RF 6) (Image)

CV.

Coldfoot Alaska. Jan 23 1907., Helbock type 2 on registry return receipt to Tanana, Alaska, very fine (Helbock RF 6) (Image)

CV.

Douglas, Alaska. Rec'd. Aug 15 9 AM 1906,, Helbock type 7 on registry return receipt to Hadlock, Washington, very fine (Helbock RF 6) (Image)

CV.

Fort Yukon Alaska Sep 21 1907,, Helbock type 1 on registry return receipt to Tanana, Alaska, very fine (Helbock RF 6) (Image)

CV.

Fort Yukon Alaska 24 Aug 1909,, Helbock type 1 on registry return receipt to New York City, small tear at bottom right, otherwise very fine (Helbock RF 6) (Image)

CV.

Fort Yukon, Alaska. Jul 22 A.M. 1922,, Helbock type 2 on UX18 to Fort Gibbon, Alaska, lightly toned, still fine, one of two known (Helbock RF 7) (Image)

CV.

Hadley, Alaska Apr 21 1917 A.M.,, Helbock type 1 on UX27 to Connellsville, Pennsylvania, very fine (Helbock RF 6) (Image)

CV.

Hot Springs AK 2-10-04,, Helbock type 2 manuscript postmark on registry return receipt to Tanana, Alaska, postmark ink a bit smudged, still very fine (Helbock RF 8) (Image)

CV.

Hot Springs Al 2-10-04,, Helbock type 2 manuscript postmark on registry return receipt to Tanana, Alaska, very fine (Helbock RF 8) (Image)

CV.

Iditarod, Alaska. Aug 30 1912 5pm,, Helbock type 2 on UX22 to Los Angeles, California, some toning, very fine strike (Helbock RF 6) (Image)

CV.

Kokrines, Alaska. June 19 A.M. 1907,, Helbock type 1 on registry return receipt to Tanana, Alaska, very fine, ex-Hall (Helbock RF 6) (Image)

CV.

Nome Alaska. Jun 23 1900,, Helbock type 2 on UX14 to Phoenix, Arizona, central crease and some water staining, very fine strike (Helbock RF 6) (Image)

CV.

Nome Alaska. June 26 1900,, Helbock type 2 on UX 14 to New York City, small repairs and faults, fine strike (Helbock RF 6) (Image)

CV.

Nulato Alaska Jan 26 1907,, Helbock type 1 with manuscript date on registry return receipt to Tanana, Alaska, very fine, the latest known use (Helbock RF 6) (Image)

CV.

Richardson Alaska 4-24-1907,, Helbock type 1 manuscript postmark on registry return receipt to Tanana, Alaska, very fine (Helbock RF 7) (Image)

CV.

Richardson Aka 10/11/09,, Helbock type 1 manuscript postmark on registry return receipt to Tanana, Alaska, very fine, ex-Hall (Helbock RF 7) (Image)

CV.

Registered, Saint Michael, Alaska. Aug 12 1907,, Helbock Type 8 on registry return receipt to Tanana, Alaska, very fine (Helbock RF 6) (Image)

CV.

Registered, Saint Michael, Alaska. Aug 17 1907,, Helbock Type 8 on registry return receipt to Tanana, Alaska, very fine (Helbock RF 6) (Image)

CV.

Registered, Saint Michael, Alaska. Aug 26 1907,, Helbock Type 8 with manuscript date on registry return receipt to Tanana, Alaska, very fine (Helbock RF 6) (Image)

CV.

Sunrise, Alaska. Apr 1 1912,, Helbock type 6 on UX14 to Hampton, Illinois, light creasing, otherwise very fine (Helbock RF 6) (Image)

CV.

U.S.S. Chicago. Seward Alaska Jul 11 P.M. 1937,, Helbock type 3 on UX27 to West Chester, Pennsylvania, some toning, still very fine (Helbock RF 6) (Image)

CV.

Udakta Alaska Oct 23 1905,, Helbock type 2 on UX14 to East Orange, New Jersey, some toning along edges, fine  (Helbock RF 6) (Image)

CV.