Strap for Seamaster Bullhead Co-Axial Chronograph Silver

The lug width is 20 mm. This parameter defines the width of the case attachment bracket and is essential to ensure compatibility with straps. Any strap you intend to pair with the Bullhead must have a width of exactly 20 mm to fit correctly into the attachment holes at the lugs.

The ideal strap depends on the intended use: vegetable-tanned alligator or gummed calf offers elegance and durability for everyday wear, emphasizing the contrast between leather and the steel case. For a more sporty and tactile profile, vulcanized rubber enhances the Bullhead's military character, while a NATO strap underscores its professional heritage. The choice depends on the dial color and frequency of use.

The Bullhead has a particular configuration due to the crown position at 12 o'clock. To change the strap, use a spring bar tool. Insert the tip of the tool into the small thin hole of the spring bar to compress the internal spring and the bar will drop slightly. Remove the spring bar completely, then remove the old strap. Insert the new 20 mm strap and reinsert the spring bar, ensuring it is secure on both sides.

Absolutely yes. Quality 20 mm aftermarket straps are fully compatible with the Bullhead. MilanoStraps offers handcrafted straps in premium materials (alligator, calf, shell cordovan, rubber) that fit perfectly with the Bullhead's lugs. The important thing is to verify that the width is exactly 20 mm and that the strap offers a lug finishing consistent with the case geometry.

A high-quality handcrafted leather strap, if subjected to regular maintenance, lasts from 3 to 5 years of daily use. Durability depends on frequency of use, exposure to moisture, perspiration, and care applied. Vegetable-tanned leather straps develop a natural patina over time that increases aesthetic appeal. Vulcanized rubber has a longer lifespan (6-7 years) but is less susceptible to color evolution. Casati Milano offers an 18-month warranty on all straps and provides personalized maintenance advice.