I noticed a Bach branded Alto trombone on Reverb. I had never heard of that and when I went to the Bach website (US) there was no mention of it. Discovered that Bach is releasing a series of "501" instruments for the "international" market. Found them on several European websites. Price is just a bit higher than John Packer and Berkeley Winds altos.

Anyone have a chance to compare them to otherwise available and "name" instruments?

Thanks!

I would bet it is a Jinbao with different engraving.