What is the name of a  kit violin and an opera?
Kit violin The kit violin, dancing master's kit, or kit, is a stringed instrument. It is essentially a very small violin, designed to fit in a pocket – hence its other common name, the pochette (French for "small pocket"). It was used by dance masters in royal courts and other places of nobility, as well as by street musicians until around the 18th century. Occasionally, the rebec was used in the same way. Several are called for (as "violini piccoli alla francese" – small French violins) in Monteverdi's 1607 "Orfeo".
General Kyd Stradivarius The General Kyd; ex-Stern Stradivarius is an antique cello crafted in 1684 by Italian luthier Antonio Stradivari of Cremona.