What caliber is Hopkins and Allen arms double action no 6 revolver?

The Hopkins & Allen Arms Double Action No. 6 revolver is typically chambered for .32 caliber cartridges, specifically the .32 Short or .32 Long. It was produced in the late 19th and early 20th centuries, known for its solid construction and reliability. Depending on the specific model and production year, some variations may also be found in .38 caliber. Always check the specific markings on the firearm for accurate information regarding caliber.