Pair of Bakelite Billiard Balls — USSR, 1930s

Two bakelite billiard balls produced in the USSR in the 1930s.
Diameter: 50 mm (≈ 1.97 in).
Approximate weight: 85 g each (≈ 3.0 oz).
One ball bears an engraving — the number 6.

The balls have damage, which is visible in the photos. The photos accurately reflect the condition; please examine them carefully. Damage can be seen on both balls.