ONOLA ON3874 Men's Automatic Mechanical Watch with Skeleton Dial and Silicone Strap
- Automatic mechanical movement winds through daily wrist motion, so no battery changes are needed.
- 45mm alloy case with mineral strengthened glass resists scratches from everyday wear.
- Silicone strap and stainless steel pin buckle keep the watch secure during workouts.
- Free Shipping Over $69
- Secure Checkout
- 30-Day Money-Back Guarantee
- 1-Year Warranty
For men who want a mechanical watch they can wear from the office to the gym, the ONOLA ON3874 pairs a skeletonized automatic movement with a silicone strap that shrugs off sweat and rain. The 45mm case reads clearly on the wrist without feeling bulky, and the see-through case back shows the movement at work.
Automatic movement, no battery
The mechanical movement is powered by the motion of your wrist. Wear it through a normal day and it keeps running; set it down for a weekend and it will need a reset. The transparent case back lets you watch the gears and rotor move.
Built for daily wear
The alloy case is 13mm thick and fitted with a mineral strengthened glass crystal that resists scratches from keys, desk edges, and door handles. A flat cone crown sits close to the case, so it is less likely to catch on a sleeve or backpack strap.
Silicone strap and stainless steel buckle
The silicone band stays flexible in heat and humidity, making it a practical choice for the gym, travel, and summer wear. The stainless steel pin buckle adjusts to fit different wrist sizes and holds the strap flat against the wrist.
Water resistance for everyday situations
Rated to 30M, the watch is built to handle rain, splashes, and hand washing. It is not intended for swimming, showering, or diving, and the crown should stay pushed in when around water.
Seven colorways
Choose from black-red, black-gold, black-blue, yellow, rose-black, silver-white, and silver-blue. Each version keeps the same 45mm case and silicone strap, so the color choice comes down to personal style.
| Brand | ONOLA |
|---|---|
| Model | ON3874 |
| Movement | Automatic mechanical (Chinese movement) |
| Case Material | Alloy |
| Case Diameter | 45mm |
| Case Thickness | 13mm |
| Crystal | Mineral strengthened glass |
| Case Back | Transparent (see-through) |
| Crown | Flat cone crown |
| Strap Material | Silicone |
| Clasp | Stainless steel pin buckle |
| Display | Analog |
| Water Resistance | 30M |
| Dial Shape | Round |
| Target Audience | Men |
| Style | Fashion |
| Available Colors | Black-red, black-gold, black-blue, yellow, rose-black, silver-white, silver-blue |
| Place of Origin | Guangdong, China |
| Launch Season | Winter 2026 |
| Package Weight | 145g |
| Package Dimensions | 10cm x 10cm x 5cm (3.94in x 3.94in x 1.97in) |
Shipping
Processing time: Orders are prepared within 2–5 business days.
Shipping time: 7–14 business days for most destinations, depending on your location.
Shipping rates: Free shipping on orders over $69. Standard shipping from $7.99. Final rates are shown at checkout.
Tracking: All packages include tracking. We email the tracking number after dispatch.
Customs: Import duties and taxes are the customer's responsibility.
Returns
30-day returns: You have 30 days from the original ship date to return your item.
Condition: Items must be unused, unworn, and in the original packaging.
Refunds: Refunds are processed within 5–10 business days after we receive the return.
Questions? Email support@fantastreet.com.
Frequently Asked Questions
Q1. Can this watch be worn while swimming?
A: No. It is rated to 30M, which covers rain, splashes, and hand washing. Swimming, showering, and diving are outside that rating.
Q2. Does the automatic movement need a battery?
A: No battery is used. The mechanical movement is powered by the motion of the wrist, so it stays running while worn and may need resetting after a weekend off the wrist.
Q3. Will the 45mm case fit a smaller wrist?
A: The case measures 45mm across and 13mm thick. The silicone strap with stainless steel pin buckle adjusts to different wrist sizes, but the case itself is a fixed 45mm.
Q4. How should the silicone strap be cleaned?
A: Wipe the silicone strap with a damp cloth and mild soap, then dry it. The watch is rated to 30M, so brief contact with water during cleaning is within its rating.
Didn't find your answer?
Send us your question and we'll get back to you by email.