It looks like you’re looking for information regarding the or activation for AutoCAD Mechanical 2012.
AutoCAD Mechanical 2012 was not just AutoCAD with a different splash screen. It included specialized tool sets: product keys It looks like you’re looking for
Alternatively, purchase an subscription (currently ~$2,655/year) which includes the modern AutoCAD Mechanical (2024/2025), but note that Autodesk no longer sells 2012 licenses. You can also search for legitimate resellers selling old perpetual licenses (rare and risky). purchase an subscription (currently ~$2