German U-Boat Type XXI: Were a class of German diesel-electric submarines designed during the Second World War. They were the first submarines able to operate primarily submerged rather than spending most of their time as surface ships.
- No glue or solder needed
- Number of sheets: 2
- Difficulty: Moderate
- Assembled size: 7.48" x 0.79" x 1.57"
- Recommended age: 14+