The Amendments section on Sheet 1 gives information that may answer some previous questions: (paraphrased) 1) battens removed from bottom of Chest and placed on lid 2) title changed from “Chest, Thompson, Sub-Machine Gun, -.45inch” stencilling is 3/4”. There may be original stencilling under the top coat and replacement stencilling on some existing chests if the manufacture date is early enough.