This appears to be an old emblem of the Order of the Amaranth. It can be found in MacKenzie’s Royal Masonic Cyclopedia (1877) with as description:
AMARANTH, ORDER OF THE, OR IMMORTALS.-An Equestrian Order, instituted by Queen Christina of Sweden, in 1653. Badge, two AA interlaced – in a laurel crown, surrounded by a label bearing the motto, Dolce nella memoria. Ribbons, white and crimson, shot or shaded blue. Jewel set with gold and diamonds. Knights 15-in number; ladies 15 in number; grandmistress, the Queen-altogether 31. The Knights, if on investiture, still bachelors, could not marry, and married Knights took an oath not to marry a second time. Sir Bulstrode Whitelock, Cromwell’s ambassador, was one of the first of this Order. The annual festival was held at the Epiphany.
Royal Masonic Cyclopedia (1877) Kenneth MacKenzie