The Holy Trinity, Hospitality of Abraham and Sarah.  Russian Orthodox Icon. 

Sizes: 

#533 - M (3½" x 4" on ⅝" wood). 
#904 - ML (5" x 6¼" on ¾" wood). 

Icons manufactured by a Russian supplier using their proprietary process of applying successive layers of color and metallic-like patterns resulting in a brilliant, detailed, and nearly three dimensional appearance.

Icon inscriptions in Church Slavonic.