If you are in Sils a walk through the peninsula of Chastè, on the Lej da Segl, is highly recommended.
Making a ring walk you can see amazing panoramas, visit the ruins of Chastè (where you can seek for the cache "Gipfel der Insel wieder Alt"), rest on nice benches. Now you can seek also for this easy letterbox.
THE LETTERBOX
At the listed coordinates you'll find a bench.
From here take 12 steps towards the lake then 12 steps on the right. You can't be wrong, it's there.
SPOILER PICTURE
If you need a spoiler picture just type in the checker the lady name written on the bench:
You can validate your puzzle solution with certitude.
THIS IS A LETTERBOX HYBRID AND CONTAINS A STAMP THAT MUST REMAIN IN THE BOX.
DUE TO THE LOW WINTER TEMPERATURES THERE'S NO INK PAD, SO PLEASE BRING YOUR OWN.
ON THE LID AND IN THE LOGBOOK YOU'LL FIND SOME NUMBERS: TAKE NOTE, THEY'LL BE USEFUL FOR A BONUS CACHE TO COME.