Strap for Sixties Stainless Steel / Iconic Grey / Alligator

The lug width of the Glashütte Original Sixties 1-39-52-11-02-01 is 20 millimetres. This measurement, taken perpendicularly between the two attachment holes, is characteristic of mid-sized watches with a case diameter around 39 millimetres. To verify strap compatibility correctly, it is essential to measure the internal distance between the lugs using a digital calliper, completely excluding the case diameter.

The ideal strap for the Sixties 1-39-52-11-02-01 is a superior-quality alligator leather with vegetable tanning, which enhances the formal geometry of the case and develops a natural patina over time. Alternatively, cognac or cigar-brown calf leather ensures aesthetic coherence with straightforward construction. For everyday versatility, NATO straps in ballistic polyamide offer practicality without mechanical compromise. Users seeking portability in informal settings opt for structured FKM rubber straps, preferably in anthracite grey or navy blue tones.

Changing the strap on the Sixties 1-39-52-11-02-01 requires the use of a dedicated tool—a spring bar tool or lever-type extractor—to compress the elastic pins (spring bars) and disengage them from the case seats. Position the tool in the lower groove of each lug, apply calibrated pressure to avoid damaging the finish, and slide the old strap downwards. Insert the new strap by aligning the holes with the pins, ensuring the spring bars lock completely in their seats. We recommend performing this operation on a soft surface to protect the case.

All straps with a 20-millimetre lug width are compatible with the 1-39-52-11-02-01. The selection includes alligator, crocodile, calf, exotic leather, NATO straps in polyamide, FKM rubber, and technical textile straps. Milano Straps offers a complete 20mm collection in multiple finishes and colourways: cognac brown, black, navy blue, grey, burgundy red, British racing green, and neutral tones. Mechanical compatibility is guaranteed for any combination of brands and materials, provided the lug width is accurate.

A superior-quality leather strap, subjected to daily use (3-5 wears per week), maintains structural integrity for 3-5 years before showing significant signs of wear: micro-cracking, loss of rigidity, and weakening of stitching. Lifespan varies dramatically based on tanning method, frequency of use, moisture exposure, and stitching quality. Vegetable-tanned leathers develop positive aesthetic patina during this period, offsetting structural ageing. With preventive maintenance—periodic cleaning, annual conditioning—it is possible to extend useful life to 7-8 years. For intensive use in humid environments, FKM rubber straps offer superior resistance (5-7 years) with minimal maintenance.