On the Hammer page in the Tanki wiki there are 2 links related to THIS puzzle THAT I have found.
1: If you click on the picture of Hammer M0, it takes you to this image: https://i.imgur.com/f0qPMU8.png Which has the number: 322929
2: If you scroll down on that page and go to the "Interesting facts" section, you'll see this sentence: Hammer was added into the game on December 17, 2014. It was the first time when the mechanics of shotguns and drum loading were applied to a turret in the game.
You can actually click on the DATE that is written. "December 17, 2014" And that takes you to another image of a destroyed tank BUT with the number: 329392
Hmmm