An extraordinary, investment-grade piece of early American lighting technology: an authentic pre-1850 flint glass whale oil lamp manufactured by the celebrated Boston & Sandwich Glass Company (Sandwich, Massachusetts), circa 1835–1845. What elevates this specimen to museum-quality status is the dual presence of two highly elusive features coveted by advanced Americana collectors: The Wheel-Engraved Font: Unlike standard plain or optic-molded fluid lamps of the period, this elongated teardrop collarless font features a pristine, hand-executed wheel-engraved (etched) motif depicting three distinct, lush grape clusters nestled among delicate trailing vines and foliage. Hand-engraving on a delicate collarless font represents a significant premium tier of original production. The "PATENT" Stamped Burner: The lamp retains its highly unique, intact two-spout (double tube) pewter cap cork burner. Extraordinarily, the upper pewter plate is crisp and clearly embossed "PATENT", a rare documentation mark on early unthreaded cork burners that survived the last 190 years entirely uncleaned with its dry, original wicks intact. The blown font is anchored via a sharp, clean wafer connection to a heavy, clear pressed glass tiered stepped base featuring characteristic cascading concentric ridges and extended corner feet. Accompanying the piece is an archival dealer provenance tag dated July 26, 1996, which accurately correlates this form to historically recorded patterns (Sandwich Base #2049 / Font #2064). Origin: Sandwich, Massachusetts, USA Manufacturer: Boston & Sandwich Glass Company Age: Circa 1835 – 1845 (Early Classical Period) Material: Heavy Lead Flint Glass, Pewter, Cork Dimensions: Approximately 9.25" Total Height (Base to top of burner) x 3" Base Width. Reference Book Title: Oil Lamps: The Kerosene Era in North America Author: Catherine M. Thuro Page/Section Reference: Page 24–29 (Detailing early glass wafer construction, pressed stepped bases, and the engineering of early collarless fluid fonts). Historical Provenance & Design Significance This museum-grade fluid lamp stands as a paramount example of pre-industrial American decorative arts, showcasing the technical genius of the Boston & Sandwich Glass Company during the 1830s. The piece masterfully marries a hand-blown font adorned with intricate, wheel-engraved grape clusters to an architectural, machine-pressed stepped base—a dual-manufacturing technique that defined early New England glass innovation. Of paramount importance to the advanced collector is the inclusion of its original, uncleaned cork burner featuring a exceptionally rare embossed "PATENT" mark on the pewter cap. Intact and retaining an untouched, deep historical patina, this lamp possesses the elusive provenance, scarcity, and material integrity demanded by elite historical collections. Curator's Note & Decorative Utility A sensational find for connoisseurs of early Americana, this c. 1835 Boston & Sandwich flint glass whale oil lamp radiates historical significance and structural grace. Its rare, hand-etched grape motif and towering teardrop silhouette play beautifully with light, while the stamped 'PATENT' cork burner underscores its pristine, untouched state. For interior designers seeking authentic gravitas, its crisp tiered base and luminous flint glass provide a striking sculptural element. This investment-grade piece offers magnificent decorative utility as a centerpiece on an early 19th-century sideboard, a focal curiosity in a historic library, or an elegant counterpoint in a clean, curated transitional interior. ----------------------------------------------------------------------------------------------------------------------