Eastman BA90 Viola Bow, 14-16+ The model 90 is the silver-mounted bow from our Andreas Eastman workshop. Following the tradition bowmakers have adhered to for centuries, we use silver mountings only on our professional quality bows. The wood is of exceptional quality, hand-carved to reveal its full tonal and aesthetic potential. Select Aged Pernambuco Silver Mounted Frog Genuine Leather Grip Mongolian Horsehair