Violin bow around 1730, clipping frog.  Basel  Museum.

Weight:   55 gr.

English violin bow around 1720, clipping frog.  Ashmolean  Museun  Oxford.

Weight: 52 gr.

Italian violin bow end  XVII century.
Weight: 50 gr.

French violin bow model Tourte Pere middle  XVIII century.

   Weight: 51 gr.

Italian violin sonata bow, end  XVII century .
     Weight: 48 to 50 gr.