Technical Archive

L & Jr
Step One S1302— lug 20mm

L & Jr Step One S1302: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Step One Day & Date Stainless Steel / Black

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

L & Jr S1302
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

S1302

Movement

Ronda caliber 7004.N Hours, Minutes, Small Seconds | Big Date, Day

The Heritage

The L & Jr Step One features the Ronda 7004.N quartz caliber with hour, minute, small seconds, large date and day of the week functions. The watch presents a classic three-hand layout with integrated calendar complications. Complete technical specifications regarding case dimensions and materials are not available for this model.

FAQ

What is the lug width of the L & Jr Step One S1302?

The lug width of the S1302 is 20 millimetres. This measurement is specific to the model and is essential for aftermarket strap compatibility. Precise measurement with a metal ruler inserted into the lug attachment ensures absolute compatibility with any quality strap.

Which strap is recommended for the L & Jr Step One S1302?

For the S1302 we recommend an authentic alligator strap with vegetable tanning, which elegantly dialogues with the sculptural geometry of the case. Alternatively, a high-density NATO strap offers versatility, or a calf leather with vegetable tanning for those seeking softness. For sports use, a quality FKM rubber strap maintains correct visual proportions.

How do you change the strap on a watch with 20mm lugs?

The change requires a spring bar tool to remove the elastic lugs that retain the current strap. Position the tool under the lug, apply gentle pressure to make it retract, then remove the strap. Insert the new strap into the upper spring, then position the lower spring. Verify that both attachments are firmly seated before use.

Is an aftermarket 20mm strap compatible with the S1302?

Yes, provided the strap is specifically constructed for 20mm lug width. For compatibility to be guaranteed, the internal diameter of the attachment must correspond exactly to 20 millimetres. Straps of 18mm or 22mm will not fit correctly. We always recommend verifying the manufacturer's technical specifications before purchase.

How long does a leather strap last on the Step One S1302?

A quality leather strap, with vegetable tanning, used daily has an average lifespan of 2–4 years before requiring replacement. Longevity depends on sun exposure, humidity, frequency of use and maintenance. A strap born from tannin, with intact grain, acquires character and patina over time, becoming more personal with conscious wear.