Friendly five cents...
Photo with the "aged" Voronov is taken in 1958. As I remember it was as an anniversary photoshoot dedicated to 50 y.o. graduation ("Messina's graduation", 1908) from the Naval Corps in Saint Petersburg. Organizers simply gathered together all the emigre officers (still alive) from all over the world.
Btw, Voronov was born in 1886, so he's about 70 there.