Rolex Oyster Speedking 4220

A manually-wound “boy’s size” model from the 1940s. Its significance lies in Rolex’s strategy of market segmentation. The “Speedking” line offered the durability of the famous Oyster case and a high-grade Precision movement in a smaller, more accessible package. This made the Rolex brand attainable for a wider audience, including younger buyers, and is an important example of the product diversification that fueled Rolex’s growth during this period.