Lot
4073 
B.F. Sturtevant's Patent Exhaust Fan, Boston Mass., multicolor ad showing two exhaust fans on reverse of 1¢ postal card (UX3) cancelled by cork to Mount Carmel Conn., Very Fine and attractive. Scott No. UX3. Estimate $500 - 750.
A CHOICE MULTICOLOR AD FOR B.F. STURTEVANT SHOWING EXHAUST FANS.
Realized: $850
Lot
4074
B.F. Sturtevant's Patent Improved Hot Blast Apparatus, Boston Mass., multicolor ad showing exhaust fan in red and gold on reverse of 1¢ postal card (UX3) cancelled by partial duplex with quartered cork to West Boyleston Mass.; minor scuff on front, Very Fine appearance. Scott No. UX3. Estimate $400 - 600.
Realized: $425
Lot
4075
B.F. Sturtevant's Patent Improved Exhaust Fan, multicolor advertisement with gold leaf on reverse, cancelled by partial "Boston Mass., Oct." duplex to Mifflinburg Pa.; slight overall toning, Fine and attractive. Scott No. UX3. Estimate $300 - 400.
Realized: $425
Lot
4076
B.F. Sturtevant's Patent Monogram Fan Blower, color advertisement in red and black on reverse, cancelled by partial "Boston Mass., Mar 26" duplex to Blackstone Mass., Very Fine and attractive. Scott No. UX3. Estimate $200 - 300.
Realized: $300
Lot
4077
Samuel A. King, Balloon Ascension, Boston Mass., illustrated ad showing balloon on reverse of 1¢ postal card (UX3) cancelled by cork cancel duplexed with indistinct cds to West Cornwall Conn.; light creasing, Very Fine. Scott No. UX3. Estimate $300 - 400.
Realized: $425
Lot
4078
Springfield Gas Machine, Gilbert & Barker Mfg., Springfield Mass., beautiful illustrated ad showing air pump in cellar and gas generator in separate vault with elaborate text on the reverse of 1¢ postal card (UX3) cancelled by cork cancel to Falls Village Ct.; horizontal crease, Fine and attractive ad. Scott No. UX3. Estimate $150 - 200.
Realized: $270