Dimensions: 40mm diameter, 51.3mm lug-to-lug, 16.2mm thick (with crystal)

Strap: Black perforated rally strap with signed steel pin-buckle
Case: 316L marine grade stainless steel with solid engraved caseback
Crown: Screw down stainless steel
Water resistance: 300m
Anti-magnetism: Field strength of 4,800 A/m (ISO 764 compliant)
Dial: Sunburst black
Luminescence: C3 Super-LumiNova with blue transmission
Movement: Seiko NH35A, automatic, time and date
Crystal: Sapphire

The evolution of rubber, from its natural form to the robust vulcanised variant and the versatile synthetic rubbers, revolutionised its uses. Synthetic rubber, in particular, found its place in footwear, belts, and recreational equipment. Its arrival in watchmaking offered a waterproof alternative to leather and a lightweight, resilient option to metallic bracelets.

The mid-20th century experienced a surge in recreational diving, largely influenced by televised underwater adventures. This led to a boom in the dive watch industry. High-end sports watches typically featured metallic bracelets, but the trend of offering optional rubber straps was growing among various watch brands.

Alsta embraced this trend, offering models like the Bronze Black, Bronze Silver, and All Red from the current Nautoscaph line on rubber straps. By the 1980s, luxury rubber straps with precious metal buckles had become a common feature across the industry.

Despite silicone rubber being less common in high-performance watch straps, Alsta stands out. We offer silicone rubber straps on diverse models, including our own Alsta Orca, maintaining our commitment to innovation and quality.

Two-year warranty covers movement failure and manufacturing defects from date of purchase. Contact service@alstawatch.com if you have a problem with your watch within the warranty period. You may also contact us outside the warranty period to arrange for repairs or regular servicing of your mechanical watch.