The quick answer.
BODERRY Windmill Skeleton Hi-Beat Automatic (Red Dial, Leather) is a 40 mm skeleton watch at $139. We recommend it for a buyer who wants an openwork mechanical watch with a sporty look at a very low price.
Why it belongs on the shortlist.
The Windmill is BODERRY’s openwork design: you can see the movement through the dial, and the red accents give it an athletic look. It ships with a leather strap here, and BODERRY describes rubber or steel options for the range.
Our verdict: skeleton design for $139.
Hi-beat movements and sapphire crystals are not usually found at this price. The Windmill is a design-led watch that gives you the pleasure of watching the movement, which is why we recommend it as a fun second watch.
The movement.
BODERRY lists a Hangzhou 7570 automatic at 28,800 bph with 21 jewels and a 72-hour power reserve. Our guide to how automatic watches work explains what to expect.
Size and fit.
BODERRY lists a 40 mm diameter, 12 mm thickness and a 20 mm strap width. Compare the dimensions with a watch you wear.
Care.
The 5 ATM rating is for splashes and rain; our water-resistance guide explains why that does not cover swimming.
The details, at a glance.
- SKU
- Windmill BDA003-04
- Case diameter
- 40 mm
- Lug-to-lug
- Not published by the brand
- Thickness
- 12 mm
- Lug width
- 20 mm
- Case
- 316L stainless steel
- Crystal
- Sapphire crystal
- Movement
- Hangzhou 7570 skeleton automatic, 28,800 bph, 21 jewels
- Rated power reserve
- 72 hours
- Listed functions
- Three-hand open-heart skeleton dial
- Water resistance
- 5 ATM
- Strap / bracelet
- Cow-leather strap, 20 mm
What draws us in
- Open-heart skeleton dial with red accents
- Hi-beat Hangzhou 7570 with a 72-hour reserve
- Sapphire crystal in a 40 mm 316L steel case
Before you choose
Skeleton dials are harder to read than solid dials, and the 5 ATM rating means splashes only. BODERRY does not publish lug-to-lug.
Who it suits.
A buyer who wants an openwork mechanical watch with a sporty look at a very low price.
When to choose something else.
Choose a solid-dial watch for legibility, or a diver for water use.
Warranty, returns and ownership.
BODERRY lists a 24-month warranty for the internal movement and a 30-day return period only for watches that have not been used, worn or strapped on. The brand advertises free shipping to most countries, with standard delivery listed at 8–12 days; local taxes and import fees may remain payable. Check the full current terms for your destination.
Closest alternatives.
- BODERRY Urban Skeleton V2.0 Titanium Automatic (Blue): A titanium skeleton automatic for $149.
- BODERRY Urban Date Aurora Green: A solid-dial Urban automatic with a date for $109.
- BODERRY ELITE Micro-rotor Automatic: A dressier BODERRY automatic with a micro-rotor.
Think beyond the diameter.
The brand does not publish lug-to-lug for this reference, so use the case width, thickness and strap length to judge fit. Use our wrist-fit guide and compare the proportions with a watch you already enjoy wearing.
BODERRY partner code and offer terms. Our supplied code is SEBASTIANBASSOL for $10 off. Check the exact model and variant at the store, then confirm eligibility and the final total at checkout.
Where to buy.
Specifications and product photography: BODERRY product page (checked October 17, 2026). Find Windmill Skeleton Hi-Beat Automatic (Red Dial, Leather) at BODERRY through our partner link and search for the selected option there. How we choose.
A few good questions.
What is the discount code for the BODERRY Windmill Skeleton Hi-Beat Automatic (Red Dial, Leather)?
The BODERRY discount code is SEBASTIANBASSOL for $10 off at boderry.com. We have not tested it on this exact model, so confirm the saving in your order summary. Every code and tested price: https://watchritual.com/promo/boderry
How much is the BODERRY Windmill Skeleton Hi-Beat Automatic (Red Dial, Leather)?
BODERRY listed the Windmill at $139 USD on October 17, 2026. BODERRY’s supplied code SEBASTIANBASSOL gives $10 off on tested products; confirm it applies to this exact watch at checkout.
What is the power reserve of the BODERRY Windmill Skeleton Hi-Beat Automatic (Red Dial, Leather)?
BODERRY lists a 72-hour power reserve from a Hangzhou 7570 automatic at 28,800 bph.
What size is the BODERRY Windmill Skeleton Hi-Beat Automatic (Red Dial, Leather)?
BODERRY lists a 40 mm diameter, 12 mm thickness and a 20 mm strap width.
Does the BODERRY Windmill Skeleton Hi-Beat Automatic (Red Dial, Leather) have a sapphire crystal?
Yes. BODERRY lists a sapphire crystal and 5 ATM water resistance.
