Technical Archive

Certina
DS First C0142351105101— lug 18mm

Certina DS First C0142351105101: 18mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

DS First Lady Ceramic Black Bracelet

Artisanal Note

"This model requires a precise 18mm lug width to preserve the original sartorial balance."

Technical Specifications

Certina C0142351105101
Lug Width
18 mm

The essential strap measurement.

Browse 18mm straps →
Reference

C0142351105101

Movement

ETA caliber G15.211 Hours, Minutes, Small Seconds | Date | Chronograph

The Heritage

The Certina DS First C0142351105101 embodies the Double Security engineering philosophy introduced in 1959, combining a composite ceramic and stainless steel case of 34.80 mm diameter. It features the ETA caliber G15.211 movement with hours, minutes, small seconds, date and chronograph functions. The 18 mm lug width is specifically dimensioned for optimal proportions and determines compatibility with aftermarket straps.

FAQ

What is the lug width of the Certina DS First C0142351105101?

The lug width of the Certina DS First C0142351105101 is 18mm. This measurement is essential for identifying compatible straps. To verify it, position the watch with the caseback facing upwards and measure the distance between the inner edges of the two horizontal mounting lugs on the case. Accurate measurement ensures that any aftermarket strap will fit perfectly.

Which strap is recommended for the Certina DS First C0142351105101?

For the C0142351105101 we recommend premium alligator leather straps for classical elegance, Italian calf with vegetable tanning for softness and durability, NATO fabric straps for sports activities, and vulcanised rubber for tropical climates. The choice depends on intended use: leather straps for formal contexts, fabric or rubber for dynamic and outdoor environments.

How do I change the strap on the Certina DS First C0142351105101?

Strap replacement requires a spring bar tool or pin remover. Support the watch with the lug facing upwards, insert the spring bar tool into the lateral slot of the lug, gently extract the spring pin, remove the old strap and slide the new one into alignment with the lugs. Reinsert the pin until you hear a click. If uncertain, consult a specialist service centre.

Can I use an aftermarket strap with 18mm lug width?

Yes, any strap certified for 18mm lug width is compatible with the Certina DS First C0142351105101. Milano Straps offers a complete collection of artisanal 18mm straps, selected for construction quality and aesthetics, available in leather, NATO and rubber. Compatibility is guaranteed by the physical parameters of the lug.

How long does a leather strap last on this watch?

The lifespan of a leather strap depends on frequency of wear, sun exposure, humidity and material quality. Natural vegetable-tanned leather typically lasts 2-4 years with moderate daily wear, whilst shell cordovan can last 5-7 years. Exposure to perspiration, rain and UV rays shortens this window. Regular maintenance (cleaning, quick drying) significantly extends strap life.