The term 'Treasured Instrument' can be broken down into two crossword solutions: AMATI and STRAD. AMATI is a family of Italian luthiers, or stringed instrument makers, who lived in Cremona, Italy from the 16th to 18th centuries. The most famous member of the family was Antonio Stradivari, who is widely considered to be the greatest violin maker of all time. His instruments, known as Strads, are highly sought after and are some of the most valuable musical instruments in the world.