Strap for Sixties Square Chronograph Stainless Steel / Forest

The lug width of the Glashütte Original Sixties 1-39-34-23-32-04 is precisely 20 millimetres. This measurement represents the distance between the case lugs where the strap connects. It is essential to verify this measurement before ordering a replacement strap to ensure absolute compatibility and avoid the need for adapters.

The optimal strap choice depends on intended use and personal preference. For formal contexts, we recommend alligator in dark tones (black, navy blue) or vegetable-tanned calf in burgundy. For daily wear, a heavy canvas NATO or a rubber technical deployante offers practicality and durability. The key is selecting materials that harmonise with the domed dial without compromising its aesthetic integrity.

Use a spring bar tool to gently compress the spring bar (the internal spring within the lug) from one side, allowing the strap to slide out. Repeat the operation on the opposite side. To install the new strap, insert the spring bar through the prepared holes and press until you hear a click. Ensure the strap is inserted symmetrically on both sides to prevent misalignment.

Yes, you may use an aftermarket strap provided the lug width is exactly 20 millimetres. Milano Straps offers a comprehensive collection of straps in leather, NATO, and rubber, all compatible and manufactured using materials and finishes that complement timepieces of this calibre. Compatibility is assured even with universal spring bars.

A high-quality leather strap, such as one crafted from vegetable-tanned leather, typically lasts 3–5 years with moderate daily wear. Longevity depends on frequency of use, sun exposure, humidity levels, and the type of finish (smooth leather ages more slowly than open-grain leather). We recommend inspecting the leather regularly where it meets the lug and having the strap professionally assessed at least once annually.