Lot 1757
Sigwalt Mechanical, "Chicago Ill * 7 30 PM * Jul 27 1889", mechanical handstamp with fancy "5" oval canceller on 2¢ green entire to Kalamazoo Mich., Carrier (7.28) arrival backstamp, Very Fine and rare.Estimate $200 - 300.
This is a very scarce mechanical postmark device, probably Sigwalt described in Leonard Piszkiewicz's Chicago book on pages 62-63.
Realized: $120