Antique Bostitch H5 Staple Gun

Vintage, Antique Hand hold staple gun. Item is in very good condition. Much of the original Greenish blue color remains. The stapler says H5 Bostitch as well as has US Patent Numbers and Brit Paten numbers. There is a "H5" scraped into one side of the stapler. I do not have any staples, so I cannot verify if the item works or not.