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vintage GEC (General Electric Company) spring tension gauge, historically used by the General Post Office (GPO) in the UK for testing and adjusting relay switch contacts.Key Details About the Tool
• Function: It measures the precise mechanical force or tension of delicate springs, commonly found in telephone exchanges and electrical relays.
• Scale: The visible scale on this model measures in grams (grms), with markings up to 24 grams.
• Usage: A small operating arm or strip hooks onto a spring to read the exact tension value on the sliding indicator.
Comes with original adjustable long nosed pliers .
