Lot
1976 
Yale Lock Man'f'g Co./Centennial Model Post Office/Stamford, Ct. Clear strike of rare circular handstamp (Bomar P78-02) on 1878 cover from Washington, D.C. franked with 5¢ Bank Note, cover addressed to the "Office of the United States Commission, Exposition Universelle" & backstamped with blue double circle "Universal Exposition, U.S. Commissioner, General's Office, Paris 1878", cover slightly reduced at left, Very Fine, a rare combination of markings of which only four examples of The Yale Lock circular marking are known. Estimate $300 - 400.
Realized: $160
Lot
1977
Yale Lock Man'f'g Co./Centennial Model Post Office/Stamford, Ct. Dateless duplex with target handstamp on 1878 cover franked with 5¢ Bank Note tied by blue cork cancel with matching "Cincinnati, O." cds at left, cover with printed address "United States Section of Education, Universal Exposition, Paris", backstamped with French "Exposition Universelle/Postes & Telegraphe" double circle Expo. postmark, Very Fine, a wonderful cover & one of the great Exposition rarities, only four examples recorded in Bomar. Estimate $500 - 750.
Realized: $300
Lot
1978
Yale Lock Man'f'g Co./Centennial Model Post Office/Stamford, Ct. Dateless duplex with target handstamp on 1878 cover franked with 5¢ Bank Note tied by cork cancel & "New Haven, Conn." cds, cover with printed address "United States Section of Education, Universal Exposition, Paris", backstamped with French "Exposition Universelle/Postes & Telegraphe" double circle Expo. postmark, Very Fine, a wonderful cover & one of the great Exposition rarities, only four examples recorded in Bomar. Estimate $500 - 750.
Realized: $500
Lot
1979
The Yale Lock Postal Bureau/Section des Etats Unis/Exposition Universelle/Paris 1878. The Yale Lock Postal Bureau/Section des Etats Unis/Exposition Universelle/Paris 1878 blue boxed handstamp (Bomar P78-01) on 1878 cover from Germany to the "American Section of the Paris Exposition", franked with two 10pf tied by "Dortmund" cds's, backstamped by French double circle postmark of the Expo., cover with some light staining at top, Very Fine, an unusual usage from a foreign country other than the United States. Estimate $300 - 400.
Realized: $150
Lot
1980
The Yale Lock Postal Bureau/Section des Etats Unis/Exposition Universelle/Paris 1878. Blue boxed handstamp (Bomar P78-01) on 1878 cover of New Jersey firm at the Expo. with printed corner card "Exposition Universelle/American Section", addressed to London franked with three French 25c Sage (one with perf flaws) tied by French "Exposition Universelle/Postes & Telegraphe" double circle Expo. postmark, Very Fine, a wonderful cover. Estimate $300 - 400.
Realized: $160
Lot
1981
The Yale Lock Postal Bureau/Section des Etats Unis/Exposition Universelle/Paris 1878. Blue boxed handstamp (Bomar P78-01) on 1878 cover from England to the "American Department, Paris Exposition", franked with 2½d tied by "London" duplex cancel, backstamped by French double circle postmark of the Expo., Very Fine, an unusual usage from a foreign country other than the United States. Estimate $300 - 400.
Realized: $150
Lot
1982
The Yale Lock Postal Bureau/Section des Etats Unis/Exposition Universelle/Paris 1878. Clear strike of boxed handstamp (Bomar P78-01) on 1878 cover from Washington, D.C. franked with 5¢ Bank Note (one blunt perf), cover addressed to the "Office of the United States Commission, Exposition Universelle" & backstamped w light strike of blue double circle "Universal Exposition, U.S. Commissioner, General's Office, Paris 1878", Very Fine, a rare combination of markings. Estimate $300 - 400.
Realized: $160
Lot
1983
1881 Western Washington Industrial Exposition (Tacoma,Ore.). Four covers with illustrated design on reverse in light blue gray showing Expo. Building, all franked with 1890 2¢ & returned as undeliverable, each with "Northern Pacific R.R. Co." corner card, one slightly reduced at right, Very Fine and scarce. Estimate $100 - 150.
Realized: $50
Lot
1984
(1883 The American Exhibition of the Products, Arts, and Manufactures of Foreign Nations, Boston). The Foreign Exhibition of Products, Arts and Manufacturer's, lovely bronze illustrated design showing the Main Exhibition Building on 1883 cover used locally franked with 2¢ Bank Note (trivial hidden defect) tied by "Boston" duplex cancel, cover with matching illustrated letterhead inviting friend to the Expo. & that he should meet him at the "Austrian Department, Foreign Exhibition", cover a bit roughly opened at top, Very Fine, a wonderful matching pair from this rare Exposition. Estimate $200 - 300.
Realized: $95
Lot
1985
Sou. Exposition Station/Oct. 14, 1884/Louisville, Ky. Large double circle postmark (Bomar L84-01) on cover franked with 2¢ Bank Note (defective) tied by matching target cancel, cover addressed to Murfeesboro with original enclosure, light cover fold through postmark, F.-V.F., a very rare marking of which less than 6 examples are known. Estimate $500 - 750.
Realized: $240