Brass Clock Winding Key Mainspring Winder Sz 7 4mm
New Chime Clock Key Size 7. This is a new brass chime clock winding key size 7. The hole measures 4 mm. We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.