Goldkämmerchen

A poor miner dug unsuccessfully for ore at the Mount Bärenstein. He had almost given up hope for a discovery, when one day a little midget appeared and promised rich mountain treasures. It touched the naked rock with its hand and a chamber full of gold and silver opened. The midget admonished the miner to remain silent about the place of discovery. But in the evening in the tavern the miner vaunted himself with his find and revealed the place of discovery to his pitmen. On the next day the midget tackled him about his breach of secrecy, touched the rock again and the Gold Chamber closed forever.

I've placed a cache for you at the rock where the Gold Chamber is said to have been. Set out for an scenic and historic tour on the mount Bärenstein. If the weather is nice, an accent on foot is highly recommended (e.g. on the Curt-Herbert-Richter trail). But there's also a parking lot directly at Stage 1.

Stage 1: Triangulation column

Read the information board and find the numbers.
"Baukosten wurden mit 3A1 Mark angegeben"
"Die Bergung der Säule und ihre Wiedererrichtung an diesem Standort erfolgte im September B00C durch die Stadtverwaltung Bärenstein."

Stage 2: N 50° 30.CAA' , E 013° 01.[A-C][2*B]A'
number of vertical bars on the railing = D
number of planks on the bench = E
Vejprt, nazvané „Grund“, která byla až do roku FGHJ zastavěna továrnami, mlýny a čentnými domy.

Stage 3: N 50° 30.[E-F][E-H]D', E 013° 01.[G-E][J-H]G'
number of planks on the bench = K
number of vertical bars on the railing (don't count the sloping ones) = L
Read the information board: "Aufgestellt vom EZV Bärenstein MNPQ"

Stage 4: N 50° 30.[L+P][K+P][L+N]', E 013° 01.[M-P][M+P][Q-N]'
number of vertical bars on the railing, reaching to the ground = R
number of planks on the bench = S
Look at the information board: Scheibenberg TUV,0 m NN

Stage 5: N 50° 30.RR[T-V]', E 013° 01.U[V-S+R]S'
When was the summit cross erected? W.X.20YZ

Final: N 50° 30.L[X-S][D+L-Y]', E 013° 01.[S-W]ZL'