Laureate head of Louis XIII, right; below, date., Cross formed by 4 groups of two crowned and leaning L's, cantoned by four lis diverging from the centre; a heart cartouche with the mint letter., Extremely rare variety of the double Louis d'or with the obverse legend "LVDO" instead of "LVD" and the reverse legend "CHRS VINC REGN IMPE" instead of "CHRS REGN VINC IMP"! Unfortunately cleaned. According to A. Clairand (Clairand 2023, p. 56), we must consider this variety to be a pettern or preparatory strike of the final type, prior to the declaration of 31 March 1640 fixing the definitive legends. This variety with the LVDO legend is also reported as a pattern by Mazerolle (1932). A fascinating milestone in French numismatics, it was the pattern of the largest gold module struck by the kings of France for circulation, engraved by the talented Jean Warin. Rarely offered for sale, it is missing from the most prestigious collections!, ·LVDO·XIII· D·G·F·ET·N·REX / ·1640, ·CHRS· ·VINC· ·REGN· ·IMPE·