The flap is part of the rear wall and wraps around the box. The belt loop is also sewn to the box and measures 3 by 3 inches and appears to have been on a belt for a long time with some weight in the box. This is an extremely well made box with no markings what so ever, see our pictures.
Cannot tell for sure who made it, could be Southern made, but it is a very neat box. The item "Original CIVIL WAR Period Brown Leather FUSE POUCH British or Confederate" is in sale since Thursday, May 27, 2021. This item is in the category "Collectibles\Militaria\Civil War (1861-65)\Original Period Items\Artillery Gear, Equipment".
The seller is "trimlady" and is located in Cascade, Wisconsin. This item can be shipped worldwide.