Mid 1860's Summer Dress

From the seller:

A gossamer1860’s printed muslin Civil War era dress. The fabric has a gray stripe and gray floral spray pattern on a white background. The neck, shoulders and armscyes are piped. The bodice is lined with a camisole that has a front hook and eye closure. The sleeve cuffs have a hook and eye closure. The skirt is unlined and has a long back sweep. The dress is in very good condition. There is one ½ inch mend on one shoulder and two pea size hole on the edge of the hemline. There is a 2 inch age mark on the back of the train and a few other minor small light colored age spots on the skirt. A beautiful display dress. Bust 34 Waist 26 Front skirt length 41 Back length 50 Width at hemline 152.

From Me:

I'd say just after the American Civil War - 1865/1866 for this dress. The waistline is more consistent with that date.