Swiss Made High-Quality WC Power Resin Mainspring for ETA C07.111 / C07.121 / C07.611 Movement Watch (ref. #6701) - for rechargeable watch springs with long service life
* Lifetime: up to 5 years or more
* Especially recommended for automatic diver's watches or mechanical watches worn daily every day! These WC power mainsprings are permeated by special oils during manufacture.
* Their slipping-out-free lubrication system ensures longer-running accuracy and reliability, particularly when the mainspring is wound to full power. Bathroom, showering, steam rooms or saunas will not damage your watch or movement, nor some diving dives.
* This stone-smooth running and winding resistance gives your mechanical watch a significantly more powerful transmission wrench so it can actually transmit energy efficiently right down to the last power reserve (when winding normally).
* A significantly longer power reserve (nominal value with 40 hours reached after several years) means your watch won't stop unexpectedly, especially important if you don't always wear it.
* High tear strength and impact resistance prevent the spring in your watch from jerking or breaking. At extremely high loads, the strain energy absorbs up to five times more than HA steel, ensuring maximum durability. Also has lower weight for lightweight designs.
* Extremely good internal damping properties minimize noise and vibration (e.g., due to walking steps or shocks inside waterproof cases), which leads to improved running stability. Resin provides very low thermal expansion, moisture resistance, condensation can also not cause harm. This premium plastic maintains initial performance over its lifetime. All these benefits make this material superior to metal, especially in harsh environments, making it ideal for replacing heavy garage parts where high peace and performance are crucial. Non-corrosive and electrochemically inert – one reason why WC mainsprings are the world's leading choice for watches.
* Automatic watches: allpartials must be perfectly-compatible and durable. An unreliable autowinding chain arrangement caused by a damaged mainspring costs thousands of dollars in spare parts alone.
* Available in appropriate dimensions for watches: tension ring bolt length 15mm x plate width 3mm x thickness 0.18mm measured to nearest hundredth of a millimetre. Length tolerance of +1mm/
