Strap for Form A Stainless Steel / White Stick / Brown Calf

The lug width of the Junghans Form 027/4734.00 is 18mm. This measurement refers to the distance between the two spring bar holes on the watch case, and it is the fundamental parameter for selecting compatible straps. All our 18mm straps have been tested to ensure perfect fit without slippage.

The recommendation depends on intended use and aesthetic preference. For formal wear, we suggest a vegetable-tanned calf strap in cognac or black alligator; for a more casual approach, cotton or linen NATO straps maintain coherence with the Bauhaus spirit of the model. If the watch will be exposed to humid environments, a black butadiene rubber is the most practical and reversible choice.

To replace the strap, you will need a spring bar tool or replacement spring bars. Position the tool under one of the lateral lugs and push gently to release the spring bar. Remove the bar. Repeat for the other side. Insert the new strap, aligning it with the two lugs, and reinsert the spring bars until they click into place. We recommend performing this operation on a soft surface to avoid scratching the case.

Absolutely. Any strap with an 18mm lug width is perfectly compatible with your Form 027/4734.00, provided the spring bars are in good condition. Our artisanal straps are specifically designed for watches with this lug width and guarantee precision fit whilst maintaining the optimal optical proportions of the case.

Durability depends on material and usage. A vegetable-tanned calf strap, if properly maintained (avoiding prolonged moisture and direct sunlight), can last 3-5 years under normal conditions; if subjected to intensive wear, it may require replacement after 18-24 months. Alligator and shell cordovan offer superior durability, often 7-10 years. Rubber and NATO straps have similar replacement cycles to leather, but greater resistance to moisture.