This is a seal from the book "Lesser Key of Solomon". According this text, the spirit Crocell, is described thus
"The Forty-ninth Spirit is Crocell, or
Crokel. He appeareth in the Form of an Angel. He is
a Duke Great and Strong, speaking something Mystically
of Hidden Things. He teacheth the Art of Geometry
and the Liberal Sciences. He, at the Command of the
Exorcist, will produce Great Noises like the Rushings
of many Waters, although there be none. He warmeth
Waters, and discovereth Baths. He was of the Order of
Potestates, or Powers, before his fall, as he declared unto
the King Solomon. He governeth 48 Legions of Spirits.
His Seal is this, the which wear thou as aforesaid"