Pirastro Eudoxa is probably the world's best known violin string and has been a staple of many players over the last 60 years. It is a traditional covered gut string. Nowadays these strings appeal mainly to players who value the unique tonal properties and playing feel of a traditional gut cored string and are prepared to accept the need for more regular tuning and their sensitivity to changes in climatic conditions.
For more info and to purchase these strings:
https://www.thestringzone.co.uk/pirastro-eudoxa-violin-strings-set
