All of the following commands assume that you are located in the appropriate score directory.
grep 'Presto' *
Answer: file "h76n6c" (i.e., Quartet Opus 76, No. 6, 3rd movement)
grep 'M5/8' *
Answer: file "magyar10.krn"
grep 'Vater und Tochter' *
Answer: file "magyar31.krn"
grep 'eee' *
Answer: file "op01n03c.krn" - i.e. Opus 1, No. 3, 3rd movement.
grep -h '!!!AIN' * | uniq
The resulting output consists of a single line, indicating that all "AIN" records are identical -- hence the instrumentation is the same for each file.
!!!AIN: archl cello organ violn