The style is treated as historical, valued at 5,000 gold.
Suitable for vehicles: Conqueror Gun Carriage.
Description: Kate, you keep complaining that you need to work with an old mechanical typewriter while you’d love to have a brand-new electric one, as if it’s better in every way. You see, there are some things that never get old. In the early 60s, I was appointed to serve in what seemed to be a top-of-the-line SPG that was experimental at the time. But you know what it was equipped with? A howitzer that was created back in 1914! World War One! Can you imagine?! I was staring at the archaic gun mounted on the newest combat vehicle imaginable and I couldn’t believe my eyes. But guess what? We were sent to target practice, and after a couple of shots… well, you see, there are just some things that never get old. 
Why arty need 3d style? Funny
Lots of casual players play arty and casual players tend to spend more than the whale players.
Oh and IIRC this will be the second arty skin in the game after the 261.
Because simply people are looking for it. Like me. Hope I could answer your question.