Side-by-side comparison of specifications and features
Compare visual case presence and physical footprint on one shared wrist. Measure your top-down wrist width for a stronger result; lug-to-lug is used when the catalog has it.
Medium (6.7″)
Estimated top width: 56.7 mm
Preliminary range: 54.7–61.8 mm.
Watch A
Visual presence
BoldCase covers 71% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 4.5 mm per side.
Watch B
Visual presence
BoldCase covers 71% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 5.3 mm per side.
Proportional guide only: visual presence and physical footprint do not predict comfort. Weight, thickness, caseback shape, rigid lugs, strap stiffness, wrist-bone prominence, wearing tension, bezel design, and case curvature change how a watch actually wears.
Start with the specifications that meaningfully differ. Expand the complete table for reference details and missing-data context.
| Specification | Seiko Prospex | Zelos Mako V3 |
|---|---|---|
| Pricing | ||
| MSRPMako V3 is $501 less at MSRP | $1,200 | $699 |
| New PriceMako V3 is $949 less based on the current snapshot | $1,649 | $700 |
| Used Price (Low)Mako V3 is $413.4 less at the low end | $1,028 | $615 |
| Used Price (High) | $1,890 | $1,079 |
| 30-Day Trend | ↑ +32.1% | ↑ +24.5% |
| Used Price Range | $1,028 - $1,890 | $615 - $1,079 |
| Dimensions | ||
| DiameterMako V3 is 0.5mm smaller | 40.5mm | 40mm |
| ThicknessProspex is 0.4mm thinner | 13.2mm | 13.6mm |
| Lug to Lug | 47.6mm | 46mm |
| Case | ||
| Case Material | Stainless Steel | Titanium |
| Water ResistanceMako V3 adds 100m water resistance | 200m (diving) | 300m (diving) |
| Dial | ||
| Dial Color | Gray | Teal |
1 field is excluded from the differences view because one watch lacks comparable data. Use “All specs” to inspect those gaps.
Seiko Prospex SPB143 and Zelos Mako V3 can look close on a spec sheet, yet the tradeoffs that matter most are usually water-ready utility versus dressier everyday wear, entry price versus premium finishing or specs. They both touch the diver and tool use case, so smaller spec differences can matter more than brand preference.
Bottom line
Water resistance is a meaningful separator here — the higher-rated option gives more flexibility for swimming or rougher daily use. Choose Seiko Prospex SPB143 if you are comfortable paying more for a stronger feature set; choose Zelos Mako V3 when swimming, beach use, or tougher daily wear is part of the plan.
Choose Seiko Prospex SPB143 when
Seiko Prospex SPB143 is a better fit for mechanical-watch enthusiasts, diver styling.
Choose Zelos Mako V3 when
Zelos Mako V3 is a better fit for mechanical-watch enthusiasts, diver styling.
Movement and upkeep
Seiko Prospex SPB143: automatic movement
Zelos Mako V3: automatic movement
Both use the same movement type, so maintenance differences are limited and fit or feature details should decide the purchase.
Size and wearability
Seiko Prospex SPB143: 40.5mm · L2L 47.6mm · 180g
Zelos Mako V3: 40mm · L2L 46mm
Their size profiles are relatively close, so fit comes down to shape, weight, and how each watch sits on your wrist.
Water resistance
Seiko Prospex SPB143: 200m
Zelos Mako V3: 300m
Water resistance is a meaningful separator here — the higher-rated option gives more flexibility for swimming or rougher daily use.
Price and value
Seiko Prospex SPB143: $1,200
Zelos Mako V3: $699
There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.
Style and use case
Seiko Prospex SPB143: diver
Zelos Mako V3: diver
Both lean into a similar diver use case — the choice is more about fit, features, and price than category.
Crystal and materials
Seiko Prospex SPB143: sapphire crystal · steel
Zelos Mako V3: sapphire crystal · titanium
Materials are broadly similar, so finish, fit, and price will matter more than the materials list alone.
Zelos Mako V3 is often the value play at current pricing, while Seiko Prospex SPB143 makes more sense if you will use its extra features regularly.
There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.
Check current deals on Amazon and eBay using the buttons below — listing prices, seller quality, and condition can change quickly.
Prices change often, so compare the latest listings and condition options before you buy.
WatchCompared may earn a commission from qualifying purchases through affiliate links. This does not change your price.
Seiko Prospex
Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.
Zelos Mako V3
Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.
Zelos Mako V3 — it is 46mm lug-to-lug versus 47.6mm, and lug-to-lug is what decides whether a watch overhangs a smaller wrist.
Zelos Mako V3 — it is rated 300m versus 200m. Both are in the same broad bracket, so treat this as a tiebreaker rather than a deciding factor.
Zelos Mako V3 is the value pick at roughly $501 less. Pay more only if a specific difference above matters to you — otherwise the cheaper one is the smarter buy. Confirm live listings, since marketplace pricing moves.
Evidence & Method
This page currently relies on normalized catalog fields and calculated differences. No external reviewer observation is used in its verdict.
Compare Watches
Start a new multi-watch comparison
Compare Watch Prices
US-focused price comparison workflow
Related Style Guide
Browse more diver watch picks
Related Budget Page
Compare similar watches in the same price band
Watch Buying Guides
Read movement, fit, and buying guides before deciding
Smartwatch Compare Hub
Compare Apple, Garmin, Samsung, and more if you are cross-shopping smartwatches
Seiko Prospex SPB143 vs Seiko Prospex SPB155 (Baby Alpinist)
tier1High-intent comparison page
Seiko 5 Sports GMT vs Seiko Prospex SPB143
tier2High-intent comparison page
Seiko SKX009 vs Zelos Mako V3
tier2High-intent comparison page
Baltic Aquascaphe Classic vs Seiko Prospex SPB143
tier2High-intent comparison page
Seiko Prospex SPB143 vs Zelos Swordfish
tier2High-intent comparison page
Seiko Prospex SPB143 vs Zelos Mako V3 Steel
tier2High-intent comparison page
Continue comparing specs and pricing, or start a new shortlist with the comparison tool and browse pages.
Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.
Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.
You can compare up to 10 watches. Browse watches and click "Add to Compare" to add more.