Here's a replacement double ended key for your Seth Thomas Sonora Chime and many Adamantine and black mantle clocks. The size is #6 (3.75mm) for winding the clock and 0000 (1.8) for adjusting the time keeping. On some Adamantine clocks the hole in the dial to adjust the fast-slow may be too small for this key. The opening needs to be at least 4.25mm. Please verify your clock.

Email us if you're not sure which clock you have orif you have any questions.

International Buyers – Please Note: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility.Please check with your country's customs office to determine what these additional costs will be prior to offerding or buying.
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