I found a secret room on this map.
(Nothing to special, as they are plentyful on this map, go ahead, take a look.)
At blu's second spawn, the split underneath it has a metal door that is locked, nocliping through, you find a room full of crates and water barrels, a soldier cut-out, a map of mvm maps and a robo-medic head.

On the wall it displays the numbers:
07 2893

what does it mean?
i tried checking google maps to see if its an area code,
i came up with the results:
2893, Sweden, clicking on it leads to a foresty area in sweden, with houses in the background
and: 7 Orton Ln, Hoquiam, Washington 98550-9617.

If anyone knows the true anwser to these odd numbers placed in this perplexing room, please post it in the comments.
Thanks.