This is an easily recognisable one-head, four-arm form of Avalokiteshvara, in bodhisattva attire, normally seated in the lotus position, with two hands in prayer at heart level, the remaining right hand holding a rosary and the left one a lotus flower.
He may have an effigy of Amitabha in his chignon, as on this Indian-style sculpture. The urna on his forehead is meant to be small lock of hair (often represented in Tibet by a circle).
13th-14th century, Tibet, Shadakshari Lokeshvara, brass, photo by Koller.
He may not have an urna on his forehead.
Even if the attributes are missing and he doesn’t have an effigy of Amitabha in his crown, the position of the hands point to Shadakshari Lokeshvara.
The above figure has a seven-leaf crown with a tiny Kirtimukha at the bottom of the central panel, spewing out vegetation that forms the next two prongs of the crown. It is not unusual to find Kirtimukha at the centre of the crown on representations of Avalokiteshvara made in the Nepalese style or by Newar artists from Nepal, where is is known as Chepu, one of the main protectors of the Kathmandu Valley.