Yamaha Dynamic Guitar No. S50 - Made in Japan circa 1966. Check the sound demo I recorded playing the guitar: https://youtu.be/GlI7fFBF8HI New steel strings (0.11), but it can also be used with nylon strings. The guitar is fun and playable, Yamaha Dynamic Guitars are incredibly underrated. This guitar is around 60 years old, so adjust your expectations accordingly. It will feel different compared to a brand new instrument (which is why I love it). I’d suggest it to people who have some experience with vintage guitars and are willing to make adjustments down the line, or who can embrace the imperfections in exchange for a special sound and vibe.