Photo by R. Brodovsky, Moscow, 1899 10.6 х 16.4 cm Inscribed on the back: “To esteemed Valeri Vasilievich Averin in loving memory from grateful I. Dalevakhin. 29.VII.1904. Kolomna." Ivan Petrovich VALEVAKHIN (1871-1952) was a Russian mechanical engineer and inspector of Moscow Region factories. After the revolution of 1917, Valevakhin taught in the Bauman State Technical Institute. C4810 VALEVAKHIN, I. P. (Валевахин И. П.)