Neumann USM-69 is a truly lovely stereo microphone - among the best in my stable - and the one I use the most for its practical package.
Its sound with Sound Devices 722 2-tracks 24Bit/192Khz digital recorder is true-to-life and I'm recording quite often, say two times per week... such a pleasure!
The German microphone is sooo good and natural sounding that I strongly suspect the USM stands for Ultimate Superb Musicality;-)