It's long gone now, but my first Bach was a new 1966 Stradivarius Model 37 ML, one of the early Elkhart models. I was upgrading from my Selmer Signet Silver Special (How's that for alliteration?) cornet during my last year in high school. I compared the Bach with a King Silversonic, an Olds Mendez, and an Olds Recording.
The King didn't do much for me, and it was a newer version of my band director's trumpet, which he had let me play also. The Mendez played quite nicely and responsively, and the Recording was OK, too, in its own very different way, but the Bach (for me) was just magic. I didn't play It, I just played! I was able to get the occasional paying gig from time to time with it. Sold it after college. Color me stupid.
Nine or ten years later, when I had resumed playing trumpet again (stories for another time), I ordered a (1984, I think) silver 72*, which played almost as well as my friend's 72* of the same year of manufacture. It suited me at the time, however, I got paid to play once in a while, and I kept it for decades (another story for another time). I loved it, it had great response, perfect valves (Never played a Bach that didn't.), and had what I thought at the time was a fairly dark timbre, which one would expect from the 72 bell shape... until I made a point of recording myself and discovered that it sounded brighter in front of the bell than behind it. I ended up selling it. It did have great flexibility as far as being able to tailor the sound to the music.
I don't miss it; I was happy to have the next owner enjoy it. I'd like to have that 37 back, though.