A rough Google Translate of the Ukrainian original article ...
Танк Объект 14 является разработкой Харьковского тракторного завода. Машину восстановили и сейчас она на службе ВСУ.
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In Ukraine, the unique tank "Object 14" was restored: what is known about the Kharkiv development (photo)
Alexander Matviyenko
December 13, 2023 at 10:19
The secret development of the Kharkiv Tractor Plant was restored after the rocket attack by the invaders and serves in one of the brigades of the Ukrainian Armed Forces, Ukrainian Telegram channels confirm.
A photo of a unique development — the Object 14 tank — was distributed in Ukrainian Telegram channels. It is stated that it has been restored and is in service with the Armed Forces. This was reported by tank historian Andrey Tarasenko.
The Soviet Union wanted to get a light floating tank into service. Among several projects, the project of the Kharkiv Tractor Plant came closest to implementation. Development of the tank began in the 1970s. In Kharkov, they developed a new "Planer" chassis and offered two versions with a 125-mm and a 152-mm gun.
The Russians created the Sprut-S tank, the Volgograd Tractor Plant even created a small series of machines. However, he has not yet shown himself on the battlefield. The Kharkiv development turned out to be much more compact. Now Object 14 has been restored and returned to service.
For the first time, two Ukrainian Telegram channels announced the appearance of a unique tank on the battlefield: russia no context and NMFTE. They also published photos of the car.
"During the Cold War, it was assumed that it would force the Dnieper and break through NATO's defenses. However, in our time it was discovered under rubble after a Russian missile attack, the tank was restored and now it serves in one of the armed forces' brigades. The gun and other components are identical to the T-tank 64," says Russia No Context.
As a reminder, on December 12, an OSINT analyst reported that the third large unit in the Russian Federation was being transferred to T-62M tanks of the 2022 model.
On December 11, social networks showed the German Wiesel tankette, which appeared in service with one of the Armed Forces brigades.