Seated on an ovoid lotus base with the right hand in varada mudra and the left raised holding the tip of his robe, his robe draped across his left shoulder in cascading folds, his face with large almond-shaped eyes.
 
References: 
https://www.christies.com/lot/lot-4246611?ldp_breadcrumb=back&intObjectID=4246611&from=salessummary&lid=1
 
https://himalayanbuddhistart.wordpress.com/2018/10/30/swat-valley-seated-figures/7th-8th-c-swat-valley-shakyamuni-silver-118-cm-u-shaped-rippling-folds-broad-collar-tight-waist-lotus-bonhams/#main