Lot 52571868 (Aug. 18) St. Louis Mo. to Lausanne, Switzerland, forwarded to Naples, Italy, fancy lime green lined envelope bearing 15¢ black (77) tied by quartered cork duplexed with "St. Louis, Mo. Aug 18" cds, red "New York, Paid All, Br. Transit, Aug 22" exchange cds, carried by Inman Line City of Boston from New York Aug. 22nd to Queenstown arriving Sep. 1st, Lausanne (9.4) arrival backstamp, forwarded to Naples with Lausanne (9.10) cds, reverse with Milan (9.12) transit and Naples (9.14) arrival cds; small edge tear, minor perf toning, Very Fine and attractive use.
Estimate $150 - 200.
Under the 1861 Switzerland-Italy Convention, postage due was 40 centisimi, but there is no indication it was collected.