Technical Archive

Junghans
Max Bill 047/4251.00— lug 17mm

Junghans Max Bill 047/4251.00: 17mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Artisanal Note

"This model requires a precise 17mm lug width to preserve the original sartorial balance."

Lug Width

17 mm

The essential strap measurement.

Browse 17mm straps →

Reference

047/4251.00

Movement

Junghans caliber J643.29 Hours, Minutes, Seconds | Date

The Heritage

The Junghans Max Bill features the automatic caliber J643.29 with hour, minute, second and date indication. The model has 17mm lugs and is distinguished by the essential design inspired by the principles of Bauhaus. The collection is named after the Swiss designer Max Bill, who collaborated with Junghans in the 1950s to develop this minimalist line.

FAQ

What is the lug width of the Junghans Max Bill 047/4251.00?

The Junghans Max Bill 047/4251.00 features a 17 mm lug width. This measurement is the distance between the spring bars that secure the strap to the case lugs. Always verify compatibility by measuring with a calliper or consulting Junghans documentation to ensure accurate fitment.

Which strap material is best suited for the Junghans Max Bill 047/4251.00?

We recommend vegetable-tanned leather straps in natural or soft brown for the 047/4251.00, as they complement the Bauhaus aesthetic and develop patina over time. Smooth black calf leather suits formal settings, whilst grey-taupe NATO straps offer daily versatility. Black vulcanised rubber is ideal for active wear. Avoid exotic leathers such as alligator, which would conflict with the watch's intentional minimalism.

How do I change the strap on the Junghans Max Bill 047/4251.00?

Place the watch on a soft surface with the lugs facing upward. Using a spring bar tool, gently apply pressure to compress the internal spring whilst sliding the bar out from one lug. Repeat for the opposite side. Align the new strap's holes with the lugs and reinsert each spring bar individually, ensuring the spring mechanism is fully engaged. Steady hands and proper tools are essential.

Can I use an aftermarket strap with 17mm lug width compatibility?

Yes. Any strap manufactured to 17mm lug width specification is functionally and aesthetically compatible with the 047/4251.00. Select artisanal manufacturers offering carefully selected leather and solid stitching, ensuring construction quality reflects the watch's sober design language. Milanostraps provides 17mm straps crafted with stringent quality control.

What is the typical lifespan of a leather strap on the Junghans Max Bill 047/4251.00?

A high-quality leather strap fitted to a 17mm lug width watch typically lasts 3-5 years with regular daily wear. Longevity depends on environmental humidity, frequency of wear, and maintenance care. Vegetable-tanned straps offer superior durability and aesthetic patination. Edge finishing quality and stitching integrity significantly influence lifespan. Protect the strap from excessive moisture and prolonged direct sunlight exposure.