Original Item: Only One Available. Everything about this image, including its presentation, makes it a splendid memento of the Civil War Era. This cased “Sixth Plate” (2.75 x 3.25 inch) tin type portrait shows an unidentified seated Union Officer. He wears a Federal Frock Coat with 9 Brass buttons, which has officer shoulder rank insignia, though we cannot make out what rank they are for. The image is clear and crisp.