A good friend of mine has just bought an old iron mortar (lucky blighter!) I'm trying to help him identify it. Calibre is about 5 1/2 inches & it is 15 inches long. It doesn't conform to regular british royal mortar patterns, mainly by not being bronze, & I doubt that it predates the early 1800s. I don't have any specs on the Federal & Confederate mortars, but I believe that the 24 pr coehorn, which looks very similar to what he has picked up, is bronze. The confederate's made an iron pattern appears to be smooth sided which may rule that out.
Were any mortars made in iron, does anyone know, with an approx 5 1/2" bore and looking similar to the bronze coehorn?? Any help appreciated, Adrian.