Description & Philatelic Analysis This exceptional Turn-of-the-Century illustrated advertising cover originated from Dolgeville, Herkimer County, New York, on June 23, 1902. The envelope features a classic medical/optical trade corner card for Carl Hoerz, Optician, Central Block, Dolgeville, N.Y., accompanied by a detailed engraving of an human eye and the slogan "GLASSES PROPERLY FITTED." Carl Hoerz was a prominent German-American jeweler and optician who operated his specialized fitting parlor in Dolgeville's Central Block at the turn of the century. The cover is addressed to family correspondence across the Atlantic: Herrn Emil Hoerz, Dreiköniggasse, Ulm a/D [an der Donau], Württemberg, Germany.
The Franking & Rate Breakdown (18 Cents Total): To pay the international registered postage, Hoerz franked the envelope with a top-tier high-denomination combination from the celebrated 1901 Pan-American Exposition Issue:
Scott #299 - 8-cent brown-violet & black ("Canal Locks at Sault Ste. Marie")
Scott #300 - 10-cent yellow-brown & black ("Fast Ocean Navigation" depicting the American Line steamship SS St. Paul)
The 18-Cent Rate: In 1902, the Universal Postal Union (UPU) international surface letter rate was 5 cents per half-ounce (15 grams), and the United States international registry fee was 8 cents. This 18-cent franking perfectly prepays an 8-cent registry fee plus a 10-cent double-weight UPU international letter (weighing between 15 and 30 grams).
The stamps are tied by a black circular datestamp from Dolgeville alongside an original red-and-white registration exchange label reading "UNITED STATES OF AMERICA / NEW YORK, N. Y. / R / No. 47699 / EXCHANGE"applied during transit on June 24. The reverse displays a purple New York foreign registry transit postmark and a clear German receiving circular datestamp from ULM (DONAU) / 3 JUL 02, documenting a rapid 10-day transatlantic delivery!
Value Drivers This cover commands top-tier pricing across multiple philatelic disciplines due to three defining attributes:
Top-Denomination Pan-American Franking: While 1¢, 2¢, and 4¢ Pan-American covers are relatively common, genuine commercial international usages combining the 8¢ Canal Locks and the series' top value, the 10¢ Fast Ocean Navigation, are exceptionally scarce and aggressively targeted by Pan-American specialists.
Illustrated Medical/Optical Advertising: Ephemera featuring detailed anatomical eye engravings and optician branding represent one of the most popular crossover categories among medical history and illustrated advertising collectors.
Immaculate Postal History Documentation: The combination of a confirmed double-weight commercial UPU rate, an intact New York registration exchange label, and clear destination arrival backstamps in Ulm creates a museum-quality exhibition piece.
