Mahoney Music Collection has books and journals with beautiful illustrations and photographs of musical instruments.
Here are a few:
Buonanni, Filippo. Gabinetto armonico pieno d’instromenti ti sonori, indicati, spiegati, e di nuovo corretti ed accresciuti. Roma: Nella stamperia di G. Placho, 1723. ML460 .B94 1723
Hipkins, Alfred J. Musical instruments, historic, rare and unique. Edinburgh: A. and C. Black, 1888, ML460 .H66 1888.
Lachmann, Erich. Erich Lachmann collection of historical stringed musical instruments. Los Angeles: Allan Hancock Foundation, University of Southern California, 1950, ML462.L8 L3.
Thöne, Jost. Italian & French violin makers. Grottammare, Italy: Jost Thöne, 2003, ML800 .T56 2003.
Yokoyama, Shinichi. The Classic bowed stringed instruments from the Smithsonian Institution. Tokyo: Gakken, c1986, ML462 W33 S64 1986.
The Strad: A monthly journal for professionals and amateurs of all stringed instruments played with the bow, issues from 1929 through 2017.
Happy anniversary Mahoney Music Collection. This collection was opened to researchers ten years ago this month.