Alexandria, VA attributed 18th century mahogany side chair with typical flat top/serpentine bottom crest rail. Posts flare out slightly. Back legs square and with slight backward flare. Front legs square. H stretcher with one slightly higher stretcher joining back legs.
See other examples in MESDA files attributed by Luke Beckerdite to the Alexandria Chairs Group.
 
Dimensions: Height: 37.25 in (94.62 cm)Width: 19.5 in (49.53 cm)Depth: 19.25 in (48.9 cm)