Read on only if you like building complex sophisticated models and solving puzzles, otherwise the model is not interesting for you...

Even if you have built the box yourself, you have almost no advantage in solving the puzzles, as it was constructed in a very complicated and opaque way (often asked and justified question)

Radio story: shortly before his death, a soldier in the Second World War hides his secret in his army radio, which he had previously modified. Decades later, this radio turns up again...

Puzzle box in the shape of a detailed old analogue army radio with microphone and mains plug (178mm x 301mm x 210mm, 2319gr.)
Various types of puzzles based on pneumatics, gears, levers, actuators, switches, chains, springs, launching and winding mechanisms
Extremely high building density
25 steps required to solve (fair but also challenging puzzles), tested by several testers with and without experience with Lego

Open secret compartment