I came across this in a piece for piano four hands (title and composer are unknown; as pointed out in the comments, it might also be a part of a longer piece). Here's the beginning of the upper part (primo):
What does it mean?
- "♫=♫" - does this indicate straight (as opposed to swing) rhythm?
- "4T. = 4s." - I don't recognize this at all.
- "63 𝅗𝅥." - is this equivalent to "𝅗𝅥. = 63", i. e., 63 measures (in 3-4 time) per minute?
More information on the piece:
- It has 67 measures; measure numbering starts at 1
- It is printed on two pages per part (upper and lower)
- No title or composer is given on the first page
- It appears to be from a book, with the first page of the lower part starting on page number 128
- It has sections A, B, and C (circled letter, section A starting at measure 9 as shown)
- It has a coda (starting with a coda sign, 𝄌) that ends with a final bar line (thin and thick vertical line)
- The last measure before the final bar line is a whole rest in all four hands