I have two 20x38 rounds both live. #1 has what looks like an AP projectile with absolutly NO paint…just plain steel with a copper rotating band. H/S is P198 5F * 39 [* = a symbol I cant make out] Im guessing this one is polite 1939. #2 Same type of projectile only painted blue with white ring next to copper rotating band. H/S 20/40 * T 41 * is a symbol the looks like an O with a x thur it.Maybe Thur Switzerland?