Up for sale is my **Seiko 6138-8020 "Panda,"** a definitive piece of horological history from the 1970s. This reference is widely considered one of the most wearable and iconic automatic chronographs ever produced by Seiko, featuring the legendary 6138B movement. I love this watch, but it simply isn’t getting the wrist time it deserves, and it’s time for a new owner to enjoy it. **The Movement: Caliber 6138B** At the heart of this "Panda" is a fully integrated automatic chronograph movement. Unlike modular designs, the 6138 was engineered with a **column wheel** and **vertical clutch** system—technology that provides a smooth, "jump-free" start for the chronograph seconds hand. This movement also allows for manual hand-winding, a practical upgrade over the earlier 6139 caliber. **Condition & Servicing** * **Performance:** The watch was serviced a few years ago and continues to run very smoothly. All chronograph functions start, stop, and reset precisely. * **Dial:** The classic silver-white dial features the signature vertical brushing and high-contrast black sub-dials. * **Case:** 40mm stainless steel case with a 46mm lug-to-lug, making it incredibly wearable on modern wrists. * **Crystal:** Domed acrylic crystal, providing that warm vintage distortion enthusiasts look for. **What’s Included** 1. **Original Seiko Bracelet** 2. **Black Leather Strap:** Also included is a "like new" black leather strap. The 8020 is a total "strap monster," and the black leather perfectly highlights the sub-dials for a dressier look. **Specifications:** * **Movement:** Seiko 6138B Automatic (21,600 bph). * **Dimensions:** 40mm diameter | 46mm lug-to-lug | 19mm lug width. * **Complications:** 12-hour chronograph, quickset day/date (bilingual). * **Year:** Circa 1970s. **Logistics** * **Face-to-Face:** I prefer a face-to-face delivery in the **San Diego area**.  * **Shipping:** I am also willing to ship the watch at the buyer's expense.  **Price:** $1,500 Please feel free to reach out with any questions or for additional high-resolution photos/videos of the movement in operation.