19th Century silk two-piece dress

Two piece silk plaid "Sunday Best" or wedding dress. Dart fitted hand stitched bodice with ruching on bodice and sleeves; coat sleeves. Pleated skirt into waistband. Many hand stitched repairs on hem area of skirt.
(currently exhibited in room 1B on dress form)

Year (or year range): 
1850-1860
Approximate era: 
1851-1900