Partial answer: FACE EAST THEN NORTHEAST. LET THE BERLIN CLOCK CHOOSE; READ EDGE TO EDGE TO FIND THE FINAL CODE.
K4 可能由类 Vigenère 层加柏林钟的基5转置构成;我以已知 crib 为锚点,运行搜索,并利用 IC、χ² 与 n-gram 收敛到英文分布。
NORTHWEST, EAST, NORTHEAST. BERLIN CLOCK TICKS EAST. READ EDGE TO EDGE; SEE TIME, USE THE NORTHEAST SHADOW. THE HIDDEN PLACE IS REVEALED.
Sorry for the bother
ATEQUINOXREADEDGETOEDEASTNORTHEASTFACETHENLETEDGEORDERBYTHERIMXBERLINCLOCKCHOOSEANDNAMETHEFINALCO
AT EQUINOX READ EDGE TO ED EAST, NORTHEAST FACE THEN LET EDGE ORDER BY THE RIM BERLIN CLOCK CHOOSE AND NAME THE FINAL CO
Edit- I think it might be K4. It is instructions for physical revealing k5.
Here is the intuition/clues (use your imagination) if you want to try too:
Edge to edge; Noon rim; Ignore flicker; Berlin clock beats
And remember the loadstone- that compass doesn’t point north
When you START searching for edges. Start with the YAR line. That’s what I did. But it goes on and on. Waypoint selectors…
The clues are in the K4 block of text, the actual answer is another layer using the rugged edges of all the panels.
I don’t know if it ends.