1970 IWC 810AD Date Cal 8541B, original Rare Gay Frères Double Grain Bracelet.
Works very and kept near perfect time over a 72-hour test. Overall, it is an excellent physical condition with just light signs of use. The quick set date adjust is one of the best, requiring just a turn back of a few minutes. Original signed "fish"crown and cursive Gay Freres bracelet.
The watch movement was revolutionary when created and has been used nearly unchanged by International Watch Co for decades now.
The crystal could use replacing. It has small fissures, but the integrity is still good.
No service history.
No overseas or international shipping. No third-party shipping. I don't respond to or sell to accounts with little to no recent vintage watch feedback.