Technical Archive

Glashütte Original
Senator 1-89-02-01-04-01— lug 21mm

Glashütte Original Senator 1-89-02-01-04-01: 21mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Senator Cosmopolite White Gold / Silver / Alligator / Pin

Artisanal Note

"This model requires a precise 21mm lug width to preserve the original sartorial balance."

Technical Specifications

Glashütte Original 1-89-02-01-04-01
Lug Width
21 mm

The essential strap measurement.

Browse 21mm straps →
Reference

1-89-02-01-04-01

Movement

Glashütte Original caliber 89-02 Hours, Minutes, Small Seconds, World Time, Day / Night Indication, Additional 12 Hour Hand (adjustable) | Big Date, Day | Power Reserve Indicator

The Heritage

The Glashütte Original Senator 1-89-02-01-04-01 is a white gold dress watch (44mm case) with manual-wind Caliber 89-02 movement, featuring hours, minutes, small seconds, world time with day/night indicator, 12-hour adjustable hand, big date, and power reserve. The movement oscillates at 21,600 A/h (3 Hz) with open-balance visible through sapphire caseback. Lug width is 21mm, matching vintage Senator proportions. Best paired with alligator or shell cordovan straps from our 21mm collection.

FAQ

What is the lug width of the Glashütte Original Senator 1-89-02-01-04-01?

The lug width of the Senator 1-89-02-01-04-01 is 21mm. This is the classic measure found on traditional dress watches. To verify, measure the internal space between the lug edges with a digital calliper, parallel to the dial.

Which strap is most suitable for a white gold Glashütte Original Senator 44mm?

For a white gold Senator, we recommend genuine alligator leather (which enhances classical elegance), Horween shell cordovan (which develops a rich patina over time), or vegetable-tanned leather in dark brown or black (for greater versatility). The choice depends on personal usage context and preference regarding patina development.

How do I change the strap on a watch with 21mm lugs?

Position the watch on a soft pad with the lug side facing upward. Use a spring bar tool to gently compress the internal spring bar passage, extracting the spring bar pin. Repeat for the other lug. Insert the new strap by compressing the passage again, until the pin clicks into position.

Can I use an original aftermarket strap on a Glashütte Original Senator 1-89-02-01-04-01?

Yes, provided the lug width is exactly 21mm. Artisanal straps crafted from premium materials (alligator, shell cordovan, vegetable-tanned leather) are fully compatible. Ensure the strap is flawless and that the lug passage is constructed with precise tolerances.

What is the average lifespan of a leather strap on a daily-wear watch?

A quality leather strap, whether vegetable-tanned or shell cordovan, typically lasts 3–5 years with daily wear. Longevity depends on humidity, perspiration, maintenance, and leather quality. Well-aged leather can last longer, developing a desirable patina whilst remaining structurally sound.