The Keep (1983)
John Vine: Lutz
Captain Klaus Woermann : [catching Lutz attempting to chisel out a cross] Soldier, what's your assignment?
Lutz : To string lights, sir.
Captain Klaus Woermann : Then what the hell are you doing? Answer!
Lutz : The silver crosses, sir. There's talk among the men. They hide silver here. Treasure, sir.
Captain Klaus Woermann : Private Lutz, it's been a profitable day for you! Not only have you learned the crosses are made of nickel, not silver, but you have earned yourself a place on first watch all week!