Circa 1880, this is the cobalt-colored version of this popular hair bottle.

Embossed: AYER'S // HAIR VIGOR

Height:  6 1/2" 
Color:  cobalt (deeper and more purple than in the pictures)

Condition: the bottle is attic mint condition, the stopper is original even with cork coating. The only flaw is that the stopper has a few very teeny nips around the edges, no harm.