I own a left hand SBE 1. Got it the first year they started making them in LH If my memory serves. I have the receipt from when I bought it but there is no date on it. Not sure why. I think it was the mid or late 90's.
It's my waterfowl and dove gun and I really like it...now. Had some jamming problems in the beginning but I fixed them, Benelli wouldn't. The gun was also designed to shoot 1 1/8 oz loads or heavier. I got it to shoot 1 oz loads reliably. One of the important things to get it to shoot well (especially in cold weather) is to take apart and clean the recoil spring in the stock once a year. I also shoot it dry (no lube) once it gets cold, late November.
I use it a lot and waterfowl hunting is tough on a gun. It is showing lots of wear, some parts are bare of any coating, but still going. It has been shot thousands of times.