Aviator Square Steel | Automatic Watch – 40mm
$ 179.00
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.
At Wclocks, we stand behind the quality of our products. All items are carefully inspected before shipping to ensure they meet our standards of craftsmanship and reliability.
Depending on the product and model, our items include a warranty of up to 3 years from the date of delivery.
This warranty covers manufacturing defects and mechanical issues under normal use. If a problem occurs during the warranty period, our team will provide replacement parts, repair assistance, or a suitable solution when necessary.
If your item arrives damaged, defective, or incorrect, please contact us within 14 days of delivery and include photos so we can assist you promptly.
For full warranty terms, please review our Terms & Conditions
Shipping & Delivery
Orders are processed within 1–5 business days. Once shipped, you will receive a tracking number by email.
Delivery usually takes 7–14 business days, depending on your location and the carrier. All Wclocks timepieces are carefully packaged for safe delivery, though shipping times may vary due to customs or carrier delays.
Returns & Exchanges
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 requests must be made within 14 days of delivery, and items must be unused and in their original packaging. Return shipping costs are the responsibility of the customer, and a restocking fee of up to 20% may apply.
If your item arrives damaged or incorrect, please contact us with photos so we can arrange a solution. For full details, please review our Terms & Conditions
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