1867
- First movements produced, April
1942
- Elgin expands to a new plant in Auror, Illinois. Elgin becomes the first US based watch company to produce jewels for watch movements.
1948
- Mr T. Albert Porter dies, January 24.
1949
- Elgin closes the plant in Aurora, Illinois.
1950
- Elgin closes the plant in Aurora, Illinois.
1951
- Elgin purchases The Wadsworth Case Company of Dayton, Kentucky. 19 of December.
- Plant No. 2 in Elgin, reopened.
1952
- First electronic movement publicly announced and demonstrated, March.
1955
- Elgin purchases Advance Relay and Electric, March.
1961
- Elgin released their electronic movement (725) to market, November.