Origin: Continental Europe (Flemish / Dutch Metalworking Tradition)

Age: Circa 1750–1790 (18th Century)

Materials: Heavy-gauge hand-hammered sheet brass, hand-twisted brass suspension hook, iron/copper structural rivets, historic copper/spelter brazing seam lines.

Dimensions & Physical Specifications:

• Height: ~8.5 inches tall (overall vertical height, excluding top hook and twist)

• Length: ~6.5 inches long (from backplate mount to tip of lower reservoir spout)

• Width: ~3.75 inches wide at the widest point of the drip pan

• Weight: 10.8 oz (substantial heavy-gauge brass construction)

Exceptional scarce. While standard wrought iron double crusies are occasionally encountered in early American and European lighting collections, 18th-century brass double crusie lamps of this magnitude are genuinely scarce.

• Material Rarity: Brass was a costly commodity compared to wrought iron or sheet tin; as a result, utilitarian grease lamps were almost universally forged in iron. High-status brass examples were generally reserved for prosperous Dutch, Flemish, or English townhomes.

• Exceptional Scale: Measuring ~8.5 inches tall (excluding hook/twist) with a 6.5-inch long pan and weighing 10.8 oz, this is an unusually large, heavy-gauge specimen.

• Ornamental Detailing: The heart-form/spade pierced backplate with decorative punch-work (chasing/stippling) and hand-sawed geometric cutouts, the scalloped lower pan tab with star-burst stampings, and the twisted iron/brass hook suspension place this far above standard folk pieces.

• Maker/Foundry Markings: The mark embossed/struck beneath the hook bracket (the "9" or "6") represents either a maker's mark, size/mold indicator, or a Guild inventory number—a feature almost never found on standard crude grease lamps.

Architecture & Craftsmanship: This masterpiece of early domestic lighting features a complete two-part gravity drip system. The upper fuel pan holds the animal grease/fat and wick, tapering down to a pinched wick spout. It hooks directly into a keyhole slot on the vertical backplate riser. The larger lower catch pan collects unburned oil run-off, preserving expensive fuel. The upper crown plate is decorated with elaborate hand-pierced diamond and round cutouts surrounding a central spade/heart motif, framed by fine perimeter stippling. The top is fitted with a heavy, hand-twisted square-stock brass suspension hook.

Foundry / Guild Markings: Embossed/struck on the reverse side beneath the hook mounting collar is an distinct numerical stamp—a "9" or "6". Such markings are exceptionally rare on early sheet metal lighting and denote foundry mold scale, sheet gauge verification, or trade guild registration.

Condition: Excellent, museum-grade antique condition. The brass retains its original, untouched antique surface oxidation with deep olive-gold patination, verdigris in deep crevices, and historic carbon/fire-scale residue inside the pan reservoirs from authentic usage. Structural joinery, rivets, and brazed seams remain fully intact and solid. No modern repairs, lead solder touch-ups, or aggressive over-polishing.

Authenticity Assessment

This lamp exhibits all classic primary markers of genuine 18th-century sheet brass metalwork:

1. Joinery & Assembly: The vertical backplate strip is hand-riveted to the pans with irregular, hand-hammered square/faceted rivet heads. Solder lines along the pan seams show historic copper/spelter brazing rather than modern lead or synthetic solder.

2. Surface & Patina: The brass exhibits deep, unpolished yellow-olive oxidation with dark fire-scale and carbon residue in the pan interiors from historical usage. The metal shows clear hand-hammering ripples and micro-scratching under magnification consistent with centuries of handling.

3. Tool Marks: The backplate cutouts show hand-chiseled/hand-filed inner edges rather than modern machine-stamped or laser-cut uniformity.

Reference

• Book Title: Colonial and Early American Lighting

• Author: Arthur H. Hayward

• Reference Page/Details: See Chapter II ("Grease Lamps, Crusies, and Betty Lamps"), pp. 12–18. Hayward documents the evolution of early metal grease lights, illustrating European double-pan brass crusies imported during the 18th century and highlighting the transition from simple iron single-pan lights to decorative brass double-drip arrangements.

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