vintage Fremelio piano accordion, likely manufactured in Germany during the mid-20th century (roughly the 1930s to 1950s). The "Fremelio" Brand: Fremelio is a lesser-known German brand compared to "giants" like Hohner. While they were well-made, they don't command the high collector premiums of Italian brands like Scandalli or Dallapé. Size: This appears to be a smaller model (possibly a 12-bass or 24-bass system based on the button layout). Smaller accordions are great for beginners and folk players, but professional players usually look for 120-bass models, which are more valuable.
eBay