Has anybody ever seen or heard of a Browning auto 5 16 gauge shotgun with a straight stock No pistol grip SN 224xx?

I would like to start out with I have never seen a Browning serial number as described by you.Are we sure that you have a Browning 16ga shotgun,or another made shotgun that may have used Browning,s patent?I must admit that I have never seen a straight stocked Browning shotgun or heard of one in my many years of collecting firearms.