The Rolex Explorer II Ref. 16570 is a highly regarded timepiece among collectors, known for its robust construction and classic design. It was introduced in 1989 as an update to the original Explorer II Ref. 1655. The 16570 model enjoyed a production run until around 2011 when it was eventually replaced by the updated Ref. 216570.

Here are some key features of the Rolex Explorer II Ref. 16570:

1. Case: The case of the Ref. 16570 is typically crafted from stainless steel, offering durability and a timeless aesthetic. It usually measures around 40mm in diameter, making it suitable for various wrist sizes.

2. Movement: Inside the Ref. 16570 beats Rolex's reliable automatic movement, Caliber 3185. This movement offers excellent timekeeping precision and reliability, known for its robustness and accuracy.

3. Dial: The dial of the Ref. 16570 is clean and legible, featuring the iconic Explorer-style layout with large luminous hour markers and Mercedes-style hands. Depending on the specific version, the dial may come with either white or black backgrounds.

4. Bezel: The watch is equipped with a fixed stainless steel bezel, which adds to the overall durability of the timepiece. The bezel is typically engraved with 24-hour markers, allowing the wearer to track a second time zone.

5. Bracelet: The Ref. 16570 often comes fitted with Rolex's Oyster bracelet, known for its comfort and reliability. The bracelet is typically crafted from stainless steel and features Rolex's Oysterlock clasp for added security.

The Rolex Explorer II Ref. 16570 is often referred to as "neo-vintage" because it blends vintage design elements with modern construction techniques. It's a versatile and timeless timepiece that remains highly sought after by collectors and enthusiasts alike.