Gear set‍

‍‍Mech­a­nism is stored in the P. L. Tcheby­shev’s museum of Spas-Prog­nan­skaya school of the Kaluga Region, Rus­sia.

‍‍On gear sets / After: The com­plete works of P. L. Tcheby­shev. Vol. IV. The­ory of mech­a­nisms. — Moscow-Leningrad: AS USSR. 1948. P. 54–84. (Russ­ian)