Anglo Gallic Henry V/VI (Lancaster) Billon Gros "Florette" - Rouen Mint (1420) - XF Grade - XRF Verified (46.33% Silver) - CGB Paris Expert Authenticated An outstanding, investment grade example of an Anglo-Gallic billon Gros, popularly known as a "Florette", struck during the historic transition of the Hundred Years' War following the famous Treaty of Troyes (1420). This exceptional specimen stands out due to its superb state of preservation and ironclad, expert verified provenance. Expert Authentication & Scientific Verification: Official Expert Review: This exact specimen was submitted for review to CGB Numismatique Paris. Royal coinage specialist Arnaud Clairand officially authenticated and classified the coin as a rare Withers #363A / Duplessy #387 var. issue. .Metallurgical Analysis: Absolute authenticity is scientifically backed by a professional X-ray fluorescence (XRF) spectrometry report. The analysis officially confirms a precise composition of 46.33% Pure Silver (Ag), perfectly aligning with the official royal minting standards of the 1420 billon issue. Technical Details & Specifications:Nominal / Denomination: Billon Gros dit "Florette" Issuer: Anglo-Gallic Kingdom (Henry V / Henry VI of Lancaster transition) Year of Issue: 1420 Mint: Rouen, France (Officially verified by the diagnostic secret dots placed below the "V" and the "D" in the legends, as classified by Withers #363A). Weight: 3.03 g Diameter: 23.50 mm – 25.00 mm Grade: XF (Extremely Fine) Design Details: Obverse: Three large royal fleurs de lis placed under a single, large open crown, beautifully flanked by two passant heraldic lions/leopards. Gothic script legend: + hEnRICVS: FRANCORV: REX. Reverse: A characteristic long cross fleurée featuring a crown in the 1st quarter and heraldic leopard/crown details in the quarters, inside a beaded circle. Gothic script legend: + SIT: NOME: DNI: BENEDICTV. Condition Report: The coin is in an outstanding XF (Extremely Fine) condition for this notoriously difficult medieval hammered issue. It features exceptionally sharp Gothic inscriptions, full volume on the central crowns and fleurs de lis, and is covered by a beautiful, deep historic cabinet patina. At the 7 o'clock position on the reverse, there is an authentic, contemporary flan crack created during the medieval hand hammering process. This is a completely standard trait of the era and serves as an additional guarantee of origin. No modern cleaning or alteration. Shipping: The coin will be securely packed in a professional protective numismatic capsule and premium packaging. Dispatched via fully insured mail with a tracking number provided immediately upon shipment.