GERMAN WW2 KRIEGSMARINE U-BOAT BADGE, DEUMER L/11

GERMAN WW2 KRIEGSMARINE U-BOAT BADGE, DEUMER L/11
GERMAN WW2 KRIEGSMARINE U-BOAT BADGE MADE by Wilhelm Deumer of Lüdenscheid, POLISHED
Produced in 1940-1942. Classic Tombak Deumer based on design, cutouts and reverse setup. But presumably made in low numbers before switching to the more practical setup of an entirely different zinc design.
Markred L/11. Attributed toWilhelm Deumer of Lüdenscheid badge - please see the screenshot.
Rare polished version !!
The badge is still in the original issue paper.
CONDITION: The item is described to the best of our knowledge. Please refer to pictures and email with any questions.
SIZE: 50.3 x 40.3 mm, weight 28.3 grams.
From real old collection! The item is for historic museum or private collection. Please note: last image is for sample only.
REFERENCE: V.Kempf. KRIEGSMARINE WW2 BADGES, volume 1. U-BOAT BADGES. CATALOGUE PRICE. 2014, price in XF condition $750 - please see the screenshot.
ESTIMATE PRICE: $1300 - $1500.
HISTORY of SALES: A few years ago tombak U-Boat badge were sold for $1300, $1400 and $1450 (!!) - please see the screenshots.
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WIKIPEDIA: During World War II, U-boat warfare was the major component of the Battle of the Atlantic, which lasted the duration of the war. Germany had the largest submarine fleet of the revived German War Navy (Kriegsmarine) from 1935 into World War II (1939-1945), since the Armistice of November 11th, 1918 scuttled most of the old Imperial German Navy from the First World War and the following Treaty of Versailles of 1919. This limited the surface navy of Germany's new Weimar Republic to only six battleships (of less than 10,000 tons each), six cruisers, and 12 destroyers. British Prime Minister Winston Churchill later wrote ""The only thing that really frightened me during the war was the U-boat peril.