Found on Royal Copenhagen porcelain with decoration painted overglaze of the Frantz Heinrich Müller period (1775-1801).
[5] These marks are strictly copyright.
These signatures and initials of painters and modellers, either painted or incised, are found in conjunction with the usual factory mark of the three blue lines.
General
The usual Factory Mark, in blue, found alone or in addition to painter's or modeller's signature or initials.
This mark was adopted at the suggestion of Queen Juliane Marie in 1775, and symbolizes the three waterways of Denmark—the Sound, and the Great and Little Belts.
This mark has been used on all porcelain made at the Royal Copenhagen Factory, both with overglaze and underglaze painted decoration, since that date.