Burak Bayram and Doruk Çelebi explore two bold models that embody Squale’s legacy of professional diving: the Squale 1521 Ocean (REF1521OCN.VO), known for its striking blue tones, and the Squale 1521 Marina Militare (REF1521MARINA.MIBK), a timepiece that channels a true military spirit. Both models are built on Squale’s iconic 1521 case design, yet they offer distinct personalities, making them compelling options for collectors. By blending aesthetic appeal with rugged durability, these watches stand as strong examples of professional dive timepieces that combine functionality with style. We would also like to extend our gratitude to ABT Saat for providing these models and supporting our review.