The Islander Manhasset is designed as an everyday watch, suitable for both professional settings and casual wear. It features a matte black dial with a symmetrical no-date layout, characterized by bold applied numerals at the 3, 6, and 9 positions and a traditional triangle at 12 o'clock. The dial markers and vintage-style sword hands are filled with C3 Super-LumiNova for legibility in low light. To ensure durability, the watch includes a flat sapphire crystal with an anti-reflective coating on the underside and an oversized screw-down crown that supports its 100-meter water resistance rating.

The watch is sized with a 36mm case diameter and a thickness of 12mm, offering a vintage-inspired fit for a variety of wrist sizes. It has a compact 43mm lug-to-lug distance, which prevents the watch from extending past the wrist's edge. It comes equipped with a 20mm brushed stainless steel bracelet that features negative endlinks, allowing the links to articulate directly at the case for a more natural wrap. The bracelet tapers to 16mm at the clasp, utilizes screw-in pins for resizing, and has a total weight of 125 grams.

Internally, the Manhasset is powered by the Seiko NH36 automatic movement, which is visible through a sapphire exhibition caseback. The movement has been modified to remove the day and date mechanics, ensuring there is no "ghost position" when operating the crown. This Japanese caliber supports both hand-winding and hacking, providing approximately 40 hours of power reserve.