I remember. Distributed by Stoeger Arms. Dixie use to advertise the elephant gun in their catalog as either 4 or 6 gauge. I remember seeing the elephant gun also with one of the two-piece locks. I guess it just depends on what surplus stock was on hand at the time. LOL It seems that most of them had the two-piece locks by the mid-1960's. (?)
The earliest ones I've seen, supposedly from the early 1900's had a one-piece lock plate that was very long with a reinforced style hammer. They occasionally come up at auctions.
Rick