Please help identify this frame

I would really appreciate any information that could help to identify this bike frame. I bought the frame at a garage sale and was told the frame was a “specialized” possibly s works but never had anything to back that up. I have done as much research as I can and I now doubt it to be made by specialized. But still have no idea which manufacturer made the frame. I believe it to be roughly early 2000’s period bike from geometry, style and hardware compatability. It is a aluminium alloy frame that looks to be hydroformed. It has been tig welded by hand and is a 21″ frame that weighs only 1.955 kg or 4lb 3oz. Which seems lightweight to me for a older frame? The serial number is stamped on the bb outer shell parallel to the frame and the number is : SW0401833 please check your bike serial number if anyone has one starting “SW” I would love to know the manufacturer name. The frame has capability to run rim brakes (post mount) or disk calipers. The head tube is semi integrated 50mm outside diameter 44mm inside. The cables are routed on top of the top tube in a cluster of three made of alloy and part of the frame, there are two of these “3 clusters” on the top tube positioned near the headtube and seat post. As far as I know the frame was never painted so possibly came from the factory in bare metal or lacquered finish although that’s only an assumption I made from not being able to find a trace of paint or over spray anywhere on the frame including inside of the headtube, bb, or seat tube. I can add any measurements or specific pictures if that would help to narrow it down at all. Please comment if you know anything at all that could help identify this frame. Thanks for looking!
(https://i.stack.imgur.com/B591a.jpg)