Leather straps last longer when they stay dry, clean, and rested between the office, commute, and weekend plans.
A practical routine matters because a leather strap is separate from the mechanical movement and the watch case. Knowing how to care for a mechanical watch means protecting the strap from sweat, rain, fragrance, and heat while also keeping the crown secured and the movement away from shocks and magnets. For model-specific guidance, consult the official Shanghai Watch care instructions.
Office wear is generally leather-friendly, but desk edges, tight cuffs, hand sanitizer, lotion, and perfume can shorten a strap's finish and lining life. Dress watches with leather straps—such as the A623 Revival 36mm or 7120 with leather strap options—are ideal for professional settings, but require this daily care routine. Wear the strap comfortably rather than tightly so heat and perspiration do not remain trapped against your wrist.

At the end of the day, use a soft, dry cloth to wipe the exterior and skin-facing lining. Then leave the strap unbuckled in a dry, shaded place. This simple mechanical watch daily care habit supports leather strap care without confusing it with mechanical watch maintenance for the movement.
For a daily watch care guide, remember these distinctions:
| Component | Best daily habit |
|---|---|
| Leather strap | Dry-wipe after warm or humid wear and allow airflow |
| Watch case | Wipe with a soft cloth and follow the model's water-resistance instructions |
| Crown | Keep it fully secured before wear or storage |
| Mechanical movement | Avoid strong magnets and hard impacts |
A water-resistant case does not make its leather strap water resistant. This is essential water resistance watch care: avoid rain when possible, and never treat a leather-strapped watch as swim or gym equipment.
Commuting adds humidity, wet sleeves, backpack friction, and unexpected rain. For light rain, blot the strap immediately with a clean dry cloth, open it flat, and let it air dry at room temperature. Never use a radiator, hairdryer, direct sun, or a sealed pouch to speed drying.
For exercise, cycling, hiking, swimming, beach days, or heavy outdoor work, change straps or choose another watch. For weekend activities, consider switching to a sports watch with a metal bracelet or NATO strap, such as the 114 Military with 300-meter water resistance. Sweat, saltwater, sunscreen, repeated vibration, and impact are hard on leather and can also affect watch shock protection.
A second strap gives your daily strap time to dry fully. For a 39mm dress watch like the 7120 or 1955 70th Anniversary, having two leather straps—one in brown, one in black—allows weekly rotation and significantly extends each strap's lifespan. This is especially useful for automatic watch daily wear in a humid climate or during a hot summer commute. The Shanghai Watch In Red Prairie Fire Mechanical Watch 39mm is listed with a quick-release leather strap system, but always confirm compatibility before changing any strap.
Use this conservative watch cleaning guide for normal soil and sweat:
| Strap type | Safer care method | Avoid |
|---|---|---|
| Smooth leather | Dry cloth first; a barely damp cloth only when maker guidance permits | Soaking, alcohol wipes, harsh detergent |
| Suede or nubuck | Soft suede brush or eraser | Water-heavy cleaning and standard conditioner |
| Alligator or finished leather | Dry cloth and exact maker instructions | Improvised oils and unapproved treatments |
Conditioner is not required for every strap. For compatible smooth leather, use only a very small amount after the strap is completely dry and only when the maker permits it. Do not apply conditioner to suede, nubuck, or exotic leather without explicit approval. For example, the Shanghai Watch Chime On The Bund Black Dial 40mm features an alligator leather strap that still needs protection from water.

To answer how to store a mechanical watch, keep it in a dry, stable, shaded place away from radiators, direct sunlight, humidity, and strong magnetic items. Do not close damp leather inside a travel roll or drawer. This supports shanghai watch care, shanghai watch maintenance, and reliable long-term appearance.
Leather care will not solve a mechanical watch running fast or slow. Timing changes can relate to winding, magnetism, impact, or a need for service. Keep the watch away from speakers, magnetic clasps, and other strong magnetic sources to support mechanical watch accuracy and how to keep a watch accurate.
For how to wind a mechanical watch, remove it from your wrist, turn the crown gently in the direction specified by the manual, and stop when clear resistance is felt. For how to wind an automatic watch, check your exact model first because hand-winding capability varies.
Should you wind an automatic watch every day? Usually not when regular wear keeps it powered, but a stopped or lightly worn watch may need gentle winding according to its instructions. Use your Shanghai Watch user guide for model-specific crown, winding, and date-setting directions.
Replace a leather strap when it has persistent odor, deep cracks, peeling lining, loose stitching, torn keepers, stretched buckle holes, or damage around the spring-bar area. These are security concerns, not just cosmetic wear.
Strap replacement is different from automatic watch maintenance. When considering when to service a watch or how often to service a mechanical watch, use the watch's symptoms and service history. Persistent timing changes, reduced power reserve, condensation, crown damage, or a hard impact deserve professional attention. Shanghai Watch gives a general 3 to 5 year planning reference when no model-specific interval is available in its guide on professional automatic-watch servicing.
With careful storage, sensible rotation, and timely service, the answer to how long does an automatic watch last can be decades. A leather strap is a wearable component, so replacing it when it becomes unsafe is normal ownership care.