Lang 1943 · Field Watch

Strap for Field Watch Retro Orange

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter39 mm
ReferenceL4300105
FamilyField Watch
MovementLang 1943 caliber L43.1 hours, minutes, small seconds
Year2023
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Field Watch L4300105

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Field Watch L4300105, seen from the bench

The Lang 1943 Field Watch L4300105 is a 39mm stainless steel field watch built on the principles of German watchmaking austerity and Bauhaus design. It features the L43.1 manual caliber with hours, minutes and small seconds functions, a textured dial with applied indices, and a transparent caseback revealing the movement. The 20mm lug width accommodates proportionally matched straps for this instrument-focused timepiece.

Frequently asked questions

What is the lug width of the Lang 1943 Field Watch L4300105?

The lug width of the Lang 1943 Field Watch L4300105 is 20mm. This is the precise distance between the lugs of the case. Always verify this measurement before purchasing an aftermarket strap by measuring with callipers between the two lugs.

What is the best strap for the Lang 1943 Field Watch L4300105?

The best strap depends on intended use. For daily wear, a vegetable-tanned leather strap in dark brown tones (tobacco or chocolate) enhances the watch's German character. For outdoor activities, a NATO strap in military green or stone grey is ideal. For humid environments, a structured rubber strap with precise texture is the most practical choice.

How do I change the strap on the Lang 1943 Field Watch L4300105?

The strap is changed using a caseback removal tool or a spring bar tool (pin remover). Insert the tool into the small hole beneath the lugs, apply gentle pressure to extract the pin securing the strap to the case, then slide off the old strap and insert the new one, securing the pin again.

Can I use an aftermarket strap with the Lang 1943 Field Watch L4300105?

Yes, provided the strap is 20mm lug width. Quality aftermarket artisanal straps are often preferable to OEM straps, as they offer noble materials (vegetable leather, shell cordovan) and superior construction. Always verify that the lugs are compatible with the case design.

How long does a leather strap last on the Lang 1943 Field Watch L4300105?

A vegetable-tanned leather strap typically lasts 3-5 years with moderate daily wear. Durability depends on exposure to perspiration, humidity, and sunlight. A shell cordovan strap, owing to its density and structure, can last 7-10 years. Regular maintenance (cleaning and conditioning) significantly extends the strap's lifespan.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only