Mainspring, right, tempered steel. For L&R Durs Egg locks assembled with the folded metal spring. This folded metal spring and requires drilling a new mounting peg hole in locks originally assembled with the wax cast spring.
Mainspring, right, tempered steel. For L&R Durs Egg locks with the folded metal spring. This folded metal spring requires drilling a new mounting peg hole in earlier locks assembled with the wax cast mainspring.
