This is Somdej Wat Rakang. Somdej Toh Promrangsri the maker of all Phra Somdej wat rakang the famous and powerful Buddha amulet of Thailand.
The post of Somdej Toh in Meditation is very unique and easy to identify. He was used this meditation ceremony to bless all of his Somdej Wat Rakang in the ancient time.
Somdej Wat Rakang is The King of all Phra Krueng Buddha amulet in Thailand. Somdej Toh Promrangsri the most famous sacred monk of Rattanakosin era made this amulet in the ancient time. The first of Somdej Wat Rakang was made before 1860 and continue to made in various occasions. The Somdej Toh Wat Rakang Image was made to honor Somdej Toh himself by Wat Rakang Kositaram Temple.
The image of Sacred Somdej Toh surrounded by 5 of Benjapakee amulets (Phra Somdej, Phra Rod, Phra Soomgor, Phra Nangphaya, Phra Pongsupan). "Phra Somdej Wat Rakang" created 150-170 years ago by "Somdej Phutthajan (Toh) Phrom Rangsri".