The Islander Northport ISL-154 is a 40.5 mm dive watch from Islander, the in-house brand of Long Island Watch, and it was the brand’s first hi-beat diver. The stainless steel case is 12.5 mm thick with a 47 mm lug-to-lug length and a 20 mm lug width, and it is brushed on the top and sides. The black dial is embossed with a ripple pattern inspired by the Long Island Sound, with polished silver applied markers filled with C3 Super-LumiNova. A flat anti-reflective sapphire crystal covers the dial. It is powered by the Miyota 9015, an automatic movement beating at 28,800 vibrations per hour that can be hand-wound and hacks, with a power reserve of about 40 hours. Water resistance is 200 meters.

The watch shows hours, minutes and seconds, with a color-matched date at 6 o’clock framed in silver. The 120-click unidirectional coin-edge bezel carries a black ceramic insert filled with C3 lume, which replaced the earlier gray insert in June 2023. The crown screws down and the solid caseback is embossed. It comes on a fully brushed solid-link steel bracelet with solid negative endlinks, tapering from 20 mm to 16 mm, and a milled push-button clasp with six micro-adjustment positions. The case accepts Seiko SKX007 bezels, inserts and crystals.

Reviewers praise the Northport as a spec-heavy diver for the money. WatchGecko singled out the textured ripple dial, color-matched to the bezel, and said it came up empty-handed when looking for flaws. Reviewers also point to the hi-beat Miyota 9015, which keeps the case slim and gives a smooth seconds sweep, and to the easy screw-link bracelet sizing. The ISL-154 is shown as sold out on Long Island Watch’s official store at the time of writing, while other Northport dial colors remain listed.