Back in the 1980s, I was in Lew Horton's retail store in Framingham, MA. He had for sale a matched set of 3 Auto Mags in 357 AMP, 41 AMP, and 44 AMP for a price of about $4,000. All in presentation cases with serial #33. If memory serves, Lee Jurras was involved in producing these sets. It was a magnificent looking set but at the time I thought of them as impractical. I had never even heard of the 41 AMP and couldn't imagine where I would find the ammo. So I passed on the set. I'm guessing they would have been a good investment.