The Rolex 1601 is a classic timepiece from Rolex's Datejust collection, first introduced in 1958 and produced until the early 1970s. This 1971 model is renowned for its elegant design and timeless appeal. 

The 1601 features a 36mm stainless steel case, a size that has become iconic in the world of watches. It typically has an 18K white gold fluted bezel, which adds a touch of sophistication and sparkle. The watch's linen sigma dial is adorned with simple baton markers and a date window at 3 o'clock, magnified by the signature Cyclops lens on the crystal.

The movement inside the Rolex 1601 is the automatic Caliber 1570, known for its robustness and precision. This model has a vintage charm due to its early use of automatic technology, making it a beloved choice among collectors and enthusiasts. 

Overall, the Rolex 1601 embodies the essence of Rolex's dedication to quality and timeless design, making it a sought-after piece for those who appreciate classic watchmaking.