Since musical instruments are so beautiful, it’s easy to see why they’re so often included in works of visual art. It’s also easy to understand why there are so many musical iconography pages on the internet. Innumerable times I’ve hit upon these sites, probably the Recorder Home Page most frequently. The Répertoire International d’Iconographie Musicale (RIdIM) has a useful page of links pointing to flute, bagpipe and other specialized instrument sites, as well as more general music iconography sites.
Antonino Airenti, a professional bowmaker working in Liguria, has a page on his website, where he describes how he was asked to create a bow for a period bass viol, and how he went about producing it.
There’s something wonderful about Orazio Samacchini’s drawing being used in the 16th century to produce a painting, and then it being used again in the 21st century to produce a bow.