The viola bows from the first half of the 17th century are made after the same models as the violin bows from that era. You can have a closer look on the violin page.
This bow is based on an Italian original from around 1720. Length is 72cm, weight 66,7g.
This bow is copied from an original of John Kew Dodd (1752 - 1839), England, around 1800.