Strap for Orion 35 / Open Case Back

The Nomos Glashütte Orion 309 features an 18-millimetre lug width, specifically designed to complement the compact 35 mm case proportions. This measurement maintains the Bauhaus aesthetic harmony that defines the model. To verify the correct lug width on your watch, measure the space between the pins on both sides of the case: it should be exactly 18 mm.

The ideal strap depends on intended use and aesthetic preference. For formal and collection contexts, we recommend alligator or vegetable-tanned calf leather: both dialogue with the minimalist aesthetic without competing with case design. Alligator offers natural geometric grain; calf develops a noble amber patina over time. For daily wear, canvas NATO evokes German functional philosophy, whilst premium technical rubber ensures grip and resistance to temperature fluctuations without compromise.

The Orion 309 strap is changed by extracting the pins that secure the lateral lugs to the case. Use a dedicated pin removal tool or a small hammer and support block, avoiding direct strikes on the case. Position the pin directly opposite the lug hole and push gently until extraction: the old strap separates from the case. Insert the new 18 mm strap aligned with the lugs, then reinsert the pins from the opposite side until they click. Do not force: pins must enter under controlled pressure to prevent lug damage.

Yes, provided the strap is compatible with the 18 mm lug width and case attachments. All artisanal straps with this width will fit the 309 perfectly. We recommend verifying the strap's construction quality: inferior leather or loose stitching would betray the Orion's refined German engineering. Specialist manufacturers offer straps in alligator, shell cordovan, museum-grade calf leather, with finishing aligned to the case's Swiss-German standard.

A high-quality natural leather strap lasts approximately 3-5 years with daily wear, or 7-10 years with occasional or formal use. Longevity depends on: tanning quality (vegetable tanning outlasts synthetic), frequency of wear, humidity exposure, and wrist friction. Vegetable-tanned leather develops natural protective patina over time, slowing deterioration. To extend lifespan, clean the strap with a soft damp cloth, avoid prolonged water immersion, and allow the leather to breathe by alternating wears. When a strap deteriorates, the 309 accepts any 18 mm strap, enabling infinite aesthetic variations over time.