"EXTRA DRY", "EPERNAY", "CO", or "MAISON FONDEE EN 1785"
The mark consists of a neck label which includes the trademark "MONOPOLE" an eagle crest and the words "HEIDSIECK & CO MAISON FONDEE EN 1785 EPERNAY".
The lining is a feature of the mark and does not indicate color. The stippling is a feature of the mark and does not indicate color.
The English translation of "MAISON FONDEE EN 1785" is "House founded in 1785". The English translation of "MONOPOLE" is "monopoly".