A silver colored circular device 2 inches (5.08 cm) in height and 1 15/16 inches (4.92 cm) in width consisting of an annulet with 13 fivep oint stars. Within the annulet on arayed background between a halberd to dexter and a sword to sinister, a torch issuant from behind an open book with the words EXPERTO CREDE (meaning Believe One Who Has Had Experience in the Matter) on the pages, the flame haloed by three concentric rings. Over the book in base an owls quill surmounting all in base a designation scroll with the word INSTRUCTOR. Senior: A gold colored circular device 2 inches (5.08 cm) in height and 115/16 inches (4.92 cm) in width consisting of a green annulet with 12 five point stars arrayed around a polestar in chief all gold. Within the annulet on a rayed background between a halberd to dexter and a sword to sinister, a torch issuant from behind an open book with the words EXPERTO CREDE (meaning Believe One Who Has Had Experience in the Matter) on the pages, the flame haloed by three concentric rings. Over the book in basean owls quill surmounting all in base a designation scroll with the words SENIOR INSTRUCTOR. Master: A gold colored circular device 2 1/8 inches (5.40 cm) in height and 21/8 inches (5.40 cm) in width encircled by a laurel wreath a green annulet with 123 five point stars arrayed around a polestar in chief all gold. Within the annulet on a rayed background between a halberd to dexter and a sword to sinister, a torch issuant from behind an open book with the words EXPERTO CREDE (meaning Believe One Who Has Had Experience in the Matter) on the pages, the flame haloed by three concentric rings. Over the book in base an owls quill surmounting all in base a designation scroll with the word MASTER INSTRUCTOR.