23mm, Confederate Local Infantry Roman "I" button with a highly desirable EM Lewis "E.M.L&C./Richmond, VA", rmdc backmark. This button is nondug, undented, and the shank wobbles against the back.  Importantly, this specific example was formerly a part of the collection of Richard “Dick” M. Hammond and is pictured as Plate Number 2, on page 394 of the book by Mike O’Donnell & Howard Crouch, The Hammond Civil War Collection. You will want to retain this provenance.