What do the numbers mean?

While replaying the tutorial from Hitman 2016 I stumbled upon these pipes, with numbers written on them.

These numbers (520 and 950) sounded familiar to me, and for good reason. In the treehouse in Whittleton Creek there’s a wooden board with numbers written on it:

Again 520 and 950, plus a new number: 980. It might just be coincidence or a troll by the devs, what do you all think?


It could be little makers marks they left in? Often times when gave devs go to school together or a number of them have something in common in that vein, they will leave their class number or some symbol of themselves in as an Easter egg.