Reb87,
The little production made 20ga that I have pictured at the beginning of this thread doesn't have those extra t shaped lugs...but I also have a his personal gun, another twenty, fully engraved in the very same fashion, and it does have the t shaped lugs including several other strange experimental features...what do you suppose the reason for those lugs was? also, I have Baker #38, and it too has those lugs