Antique Tibetan Mandala Buddhist Protective Talisman 19th Century Tibet

Antique Buddhist Protective Talisman Chart (Tibetan: Srid Pa Ho )Mandala made in the form of copper plaque, with highly skilled and detailed repousse decoration and chased details, 19th century Tibet.
A Tibetan astrological chart is an instructional tool and an auspicious talisman that brings good fortune. The central figure is a tortoise, emanation of Manjushri, lying on its back with various diagrams drawn on the flat stomach of the shell. The head is at the top, and four limbs protrude from the circle of the body, each holding a stick with an impaled corpse.
The figure is surrounded by the flames of wisdom and flanked by two dancing Apsaras. The innermost circle has 9 squares which contain the 9 magic numbers (Tib.: me wa gu). The outer circle is divided into 12 lotus petals and supports the 12 animals of the 60 Year Cycle. The symbols for the five elements are found along the sides.
At the top center is the bodhisattva Manjushri, seated on a lotus, with one face and two hands holding a flaming sword of wisdom in the right and the stem of a lotus at heart in the left. On the right sits the bodhisattva Vajrayana. On the left sit Avalokiteshvara.
Below the central tortoise are two smaller rondels containing engraved auspicious protection mantras. The rondel on the left is in the tortoise form, and the rondel on the right site is in the form of the lotus flower. Between these are the symbols of the eight planets: Sun, Moon, Mars (eye), Mercury (hand), Jupiter (kila), Venus (stick), Saturn (sheaf), Rahu (bird head). The first 7 also represent the days of the week.
At the top left is the stylized mantra of Kalachakra, the ten power letters (Tib.: nam chu wang den). At the right, the 9 magic numbers are repeated. Vertically along both sides are various auspicious letters and symbols for balancing and subjugating inauspicious circumstances. Along the bottom section is a finely hand engraved Tibetan script with further explanation of the various symbols on the Chart.
 
DIMENSIONS:
30.5 cm x 27.5 cm. (12 inches x 10.8 inches).
 
CONDITION: In good condition, with beautiful dark patina showing age and use.