This is a new brass chime clock winding key size 7 The hole measures 4 mm
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Vintage Brass Clock Winder Winding Key 4mm #7
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4Mm Clock Key FOR SALE! - PicClick UK
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2 Pack Clock Winding Key #9 4.5mm, Antique Clock Winding Key Set for Wall Clocks, Alarm Clocks and Wind Chain Repair (4.5mm & 0.177 Inch Hole) : Tools & Home Improvement
Comprehensive 5-in-1 Functionality Includes the most common odd sizes (3, 5, 7, 9, 11) for versatile clock winding applications Crafted from Solid
SE Brass Clock Winding Key 5-in-1 Odd Sizes- Durable Universal Clock Key for Efficient Winding - JT6335
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ToolTreaux Universal Brass Antique Grandfather Winding Clock Key (Odd) : : Home