Civil war dating
The largest tend to be found in the earliest sets, c. French and English origin tourniquets are much more ornate than the ones used by American makers.
I mention this because there were many French instruments imported into the states and colonies.
Many additional Civil War images are in other collections, including drawings, prints, and photograph albums to name a few. Liljenquist Family Collection - Over 700 rare ambrotype and tintype photographs highlight Civil War soldiers and their families, both North and South. Gladstone Collection of African American Photographs -- Includes more than 200 photographs from the Civil War era More Civil War pictures -- see the Related Resources page.
Tourniquets are used to stop blood flow in arteries and veins.
At that time they didn't sterilize, so a screw attachment made the most sense.
Since my focus is on the pre-1865 Civil War era until about 1820, I'll show examples of the forceps one would expect in the type of surgical sets shown on this site.
Earlier tourniquets have cast buckles and brass prongs, while later models during the Civil War used a steel buckle frame and steel prongs.