Lot
414 
(Town & Postmaster) Guerneville, Cal., G. Dietz P.M., May 14, 1888 (Sonoma), cds and negative star in circle duplex (SON-2500) tying 3¢ Banknote on cover to Oakland, receiving backstamp, Very Fine, Guerneville had seven different town & postmaster townmarks, this is the only recorded example in Williams (photo on web site). Estimate $150 - 200.
Realized: $210