Many characteristics of this statue reflect the style of Unified-Silla sculpture from the eighth century. These include the elongated oval head; the face with long, narrow eyes, and a small mouth; the strong, simplified rendition of the garments with repeated arcs over the midsection and thighs; as well as the upturned tips of the lower petals on the lotus pedestal.  
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The pedestal and statue of this small-scale Buddha have each been cast in a single cast. The fact that traces of large habaki (protrusions that once connected the inner and outer molds) are found in three places on the back of the statue is a special characteristic generally found in gilt-bronze sculptures from the Unified Silla period.
 
Yasuo Inamoto 
Masterworks from the Nara Buddhist Sculpture Hall at the Nara National Museum. Nara National Museum, 2010, p.136, no.169.