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Santos Steel | Automatic Watch – 40mm | Wclocks
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Santos Steel — Santos-Style Square Automatic, 40mm
A 40mm square automatic in stainless steel, built around the Santos-style case shape that has defined aviation-inspired watchmaking for over a century. Sapphire crystal. Integrated steel bracelet. Hidden push-button clasp. 5 ATM. Three dial colours: Blue, Green, and White.
Key Specifications
What Makes It
Santos-Style Square Case
The square case with rounded corners and visible bezel screws is the defining shape of the Santos design tradition — an aviation heritage that dates back to the earliest days of wrist watchmaking.
Automatic Movement
Self-winding mechanical movement — no battery required. Winds through wrist motion, keeping time as long as it is worn regularly.
Sapphire Crystal
Scratch-resistant sapphire crystal protects the dial from the daily contact that dulls lesser watch crystals over time.
Integrated Steel Bracelet
316L stainless steel bracelet with a hidden push-button clasp — flows from the square case cleanly and releases securely with dual recessed buttons.
The square wristwatch case has one defining origin story: it was commissioned at the start of the twentieth century for a Brazilian aviator who needed to check the time without releasing the aircraft controls. The square case, worn on the wrist rather than kept in a pocket, solved a practical problem and in doing so created one of the most enduring case shapes in watch design. The Santos Steel carries that case language into a 40mm automatic with sapphire crystal, integrated steel bracelet, and a clean three-dial range in Blue, Green, and White.
At 40mm across and 12mm thick, the square case sits with the same flat, architectural presence on the wrist that made the Santos style influential across an entire century of watchmaking. The exposed bezel screws are part of the design vocabulary — structural details that read as honest rather than decorative. Blue is the most contemporary. Green is the most distinctive. White is the most classic and the highest-contrast against the steel case.
Styled For
Business Formal
A square case with visible screws reads as considered and design-literate — a strong choice in professional environments where round watches are the default.
Smart Casual
The integrated bracelet and 12mm profile keep it wearable across a wide range of casualwear without the case reading as too formal or too sporty.
Aviation and Travel
The case shape has over a century of aviation heritage. A fitting choice for those who spend significant time in the air.
Collectors
The Santos-style square automatic is one of the most historically significant case shapes in wristwatching. A considered addition to any collection.
Explore More at Wclocks
Browse more automatic watches and luxury timepieces from across the Wclocks collection.
Common Questions
Why does the Santos-style case have visible screws on the bezel?
Does the automatic movement need regular winding?
Which dial colour is most versatile?
Can the bracelet be sized at home?
Santos Steel — The Square Automatic with a Century of Aviation Heritage
Choose your dial colour above and order today. Free shipping on all Wclocks orders.
| Case Diameter | 40 mm |
| Case Material | Stainless Steel |
| Crystal | Sapphire-coated mineral crystal |
| Movement | Automatic (self-winding) |
| Functions | Hours, minutes, seconds, date |
| Water Resistance | 10 ATM / 100 m |
| Strap | Stainless steel integrated bracelet |
| Clasp | Fold-over deployment clasp |
| Warranty | 2 years — Wclocks |
Protected Watch Ownership
Every Wclocks watch includes warranty support for added confidence, covering key performance and manufacturing-related issues under normal use.
All Wclocks watches include a warranty of up to 2 years, depending on the specific model.
This warranty covers the watch movement and manufacturing defects under normal use.
If an issue occurs during the warranty period, we will provide replacement parts or a suitable solution when necessary.
If your item arrives damaged or defective, please contact us within 14 days of delivery with photos so our team can assist you promptly.
Warranty coverage applies to the movement and manufacturing defects under normal use. Damage caused by misuse, improper handling, external impact or normal wear may not be covered.
Safe Delivery for Your Watch
Every Wclocks watch is carefully prepared, packed and shipped with tracking, so your order can arrive safely and securely.
Orders are processed within 1–5 business days. Once your watch has shipped, you will receive a tracking number by email.
Delivery usually takes 7–14 business days, depending on your location, the carrier, customs processing and local delivery conditions.
All Wclocks watches are carefully packaged for safe delivery, helping protect the watch case, bracelet, crystal and presentation box during transit.
Return requests must be made within 14 days of delivery. Items must be unused, undamaged and returned in their original packaging.
If your item arrives damaged, defective, incorrect, or with missing parts, please contact us with photos of the item and packaging so we can review the case and arrange the best solution.
All sales are generally final. However, if you experience an issue with your order, please contact us and we will review your request case by case. Return shipping costs are the responsibility of the customer, and a restocking fee of up to 20% may apply.