User blog comment:Chaosian/Primary source for Tower Pack DLC/@comment-9513195-20130914124658/@comment-4310096-20130916143508

We know that, because that number is engraved on the gun.

Here, this is taken from the wiki's article of the Lolife:

"As the Lolife is a metro-made weapon, it has very little known history. It appears that Lolife has been produced since at least 2023. The markings on the frame say "'''VANO & PROF LTD. PISTOL SELF-LOADING ПАДОНОК. 2023'''"."