“H. Koch and Company” Factory, No. 556.
Russia, St. Petersburg, 1870s

“PATENT HERMANN KOCH & Co / ST. PETERSBURG” — a cast inscription on the frame (area of the strings of the descant register);
“Hermann Koch & Co” — inlaid with brass in the lid;
“556” — embossed with a punch on the pin block (area of the tuning pegs of the bass register)

2190×1460×980
Wood, metal, bone, fabric, felt

1958, arrived from an unknown source
Stock number: 16516/2041

The frame is cast iron. The key action is rehearsal. There are 2 pedals. The case is tinted black.
One of the personal grand pianos, which was in possession of A. K. Glazunov (1865–1936) from his childhood and until 1928.