The Alpina Seastrong Diver 300 Heritage is a Swiss-made automatic dive watch combining vintage-inspired design with modern watchmaking. This 42mm stainless steel timepiece features the AL-520 automatic movement with a 38-hour power reserve and 26 jewels operating at 28,800 vibrations per hour. The watch displays hours, minutes, seconds, and a date function at the 4 o'clock position with luminescent hands for low-light visibility.

Built for serious diving, this watch is ISO certified water resistant to 300 meters (30 ATM) with a 60-minute internal rotating bezel for tracking immersion time. The 12.3mm thick case features an anti-reflective sapphire crystal that resists impacts and shatters while deflecting light. The caseback is engraved with Alpina's Alps motif and trident symbol.

The watch comes with a textured black nylon strap (21mm lug width) designed to resist sand, sea salt, and corrosion, secured with a buckle clasp. Part of Alpina's Heritage collection, this timepiece pays tribute to classic diving watch aesthetics while incorporating the precision and reliability of Swiss automatic movement technology. The Seastrong Diver 300 Heritage represents over 140 years of Alpina's commitment to horological innovation and quality craftsmanship.