Got these in a lot today. Most interesting to me was the '40 factory dummy. Maybe someone can enlighten me as to the finish on the case, which at first look, appears to be brass. It is non-magnetic. Note that the base of the shell and extractor groove are “unfinished”. The middle shell (SL43) has had a bullet jammed in using the time proven paper dimension changer for to solidly stick everything together. LC42 was in the mix and I added it just 'cause.