Hi , I have an old bass mute that has 3 prongs and looks like it's made of brass. It has a hole near the top center about 1/2 inch wide. I aquired it from my old friend and mentor who passed away in 2008. It's surely an antique. I recently tried using it for bowing and found an unbeleiveable tone change! The lows were ALOT Louder and my bass just seemed to sound so much sweeter. I tried it using pizz and found the tone producing what seem's like a hundred sweet spots on the finger board. I thought a mute was only to quiet the instument but I have discovered that it makes mine sing. I thought it was a solid peice of metal but when it came apart in two pieces I saw the lead solder that had been holding it together. I kept forcing the mute onto my bridge when it would slip off while playing. I took it to a jeweler who of course had never seen one and he laser welded the outside edge which didn't last so now he has it again and will try a different type of repair. I cant find a picture anywhere on the internet "I could post one later If you would like" or anyone who sells them. Anything that you could tell me about this would be greatfully appreciated. Thanks , Dobby Simmons.