What are the registry keys corresponding to the three content releases visible in the SEP 11.0.7 GUI?

Hello,

if someone needs to check the current content releases in use in a SEP 11.0.7 (those three visible in the GUI, i.e. AV, NTP and PTP) with a custom script, what would be the matching registry keys to do it? I did not find the related documentation yet, if someone already has or knows it, please share it with me. According to my own investigation, it seems there are several keys which might serve this need.