Glastonbury Southern Gage was formed in 1995 when two of the largest and oldest gage companies, Glastonbury Gage and Southern Gage, were united under one owner. Glastonbury Gage was founded in 1964 in Glastonbury, CT by individuals who had trained at Pratt Whitney Machine. From these beginnings, Glastonbury Gage has continually increased its product offering and services.