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How to distinguish the lion groschen (Flemish Groot met de leeuw, German Löwengroschen, French gros au lion) by Louis I of Nevers from those of Louis II of Male?
Eagle over lion -> LOUIS I of NEVERS 1322-1346 (Vanhoudt G 2582, Gaillard 201). You can buy it here
Cross over lion -> LOUIS II of MALE 1346-1384 (Vanhoudt G 2596, Gaillard 219). You can buy it here
Our best thanks for the information to Mr. Paul A. Torongo, the author of
Collecting Medieval Coins: A Beginner's Guide, 2013. Your can buy it here