An Indian, Gujarat, greyish stone depicting the upper section of a stele

An Indian, Gujarat, greyish stone depicting the upper section of a stele
12th/13th century
The fragment carved with a central seated figure of Vishnu in a columned niche and flanked by standing assistants, the outer borders with niches containing the Vishnu incarnations Varaha and Narasimha
24 x 42 cm, mounted