4 Antique French Clock Keys Tools Sz 1-4 2.50-3.25mm

This is a new set of four French clock keys. They are used to wind French clock mainsprings. Each is steel, plated with nickel.

You receive:

• One size 1 clock key with a 2.50 mm hole
• One size 2 clock key with a 2.75 mm hole
• One size 3 clock key with a 3.00 mm hole
• One size 4 clock key with a 3.25 mm hole

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