Strap for Seventies Chronograph Panorama Date Swimming Pool

The lug width of the Glashütte Original Seventies 1-37-02-16-02-63 is precisely 26mm. This specification is determined by the 40mm case geometry and must be respected to ensure a correct installation without gaps. To measure the lug width accurately, use a digital calliper positioned between the two attachment pins of the strap, measuring the internal distance.

For this chronograph, we recommend a strap in medium brown shell cordovan or vegetable-tanned calf leather in cognac tone, which enhance the elegance of the squared stainless steel case and amplify its formal character. For a more sporting approach, a 26mm NATO strap in Cordura or a natural rubber strap offer practicality and comfort. The choice depends on intended use and aesthetic preference between classic versatility and contemporary functionality.

Strap replacement is performed using two spring bars positioned at the case lugs. You must use a specific tool (spring bar tool) to compress the pin and extract it from the hole on the case, then insert the new 26mm strap into the same holes. The procedure requires delicacy to avoid scratching the case. If unsure, it is advisable to entrust the operation to an experienced watchmaker.

Yes, quality aftermarket straps exist for the 26mm lug width. It is essential to select straps specifically designed for this width, as standard sizes (22mm, 24mm) will not guarantee a proper fit. Many artisans, including Milano Straps, offer personalised leather, NATO and rubber straps for the 26mm size, with options for deployant clasp or standard buckle finishes.

The longevity of a leather strap depends on the tanning type and intensity of use. A quality shell cordovan or calf leather strap, worn daily, has an average lifespan of 3-5 years before replacement is needed. With proper maintenance (regular cleaning, moisture protection) and moderate use, durability extends to 7 years. Vegetable-tanned straps develop natural patina, improving aesthetically with ageing, whilst their structure remains robust if crafted by specialised manufacturers.