It is a Meinel & Herold German Chromatic Button Accordion in exellent working order. 

It has German brass treble reeds with "O" mark which gives this accordion unique pleasant sound.

Characteristics: 

· Treble: 3 rows, 52 buttons

· Bass: 5 rows, 100 buttons 

· Treble reed plates: 3 (three reeds for each button on right side) 

5 registers

· Bass reed plates: 5 (five reeds for each Bass button on left side, and 3*3 for accord button) 

2 registers

· Weight: around 8 kg 

· All treble and bass reeds are in tune 

· All buttons and mechanics work properly

Please write me if you have any questions.