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 73% of your modeled wrist width.
Physical footprint
Near the edgeEstimated clearance: 3.6 mm per side.
Watch B
Visual presence
BoldCase covers 70% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 4.8 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 | Orient Sun & Moon | Seiko Spirit Green |
|---|---|---|
| Pricing | ||
| MSRPSpirit Green is $230 less at MSRP | $370 | $140 |
| New PriceSpirit Green is $171 less based on the current snapshot | $350 | $179 |
| Used Price (Low)Spirit Green is $70.7 less at the low end | $239 | $168 |
| Used Price (High) | $889 | $588 |
| 30-Day Trend | ↓ -14.5% | ↑ +13.1% |
| Used Price Range | $239 - $889 | $168 - $588 |
| Dimensions | ||
| DiameterSpirit Green is 1.7mm smaller | 41.5mm | 39.8mm |
| ThicknessSpirit Green is 1.4mm thinner | 13mm | 11.6mm |
| Lug Width | 22mm | 20mm |
| Lug to Lug | 49.5mm | 47mm |
| Movement | ||
| Movement | Automatic | Quartz |
| Case | ||
| Water ResistanceSpirit Green adds 50m water resistance | 50m (swimming) | 100m (recreational diving) |
| Dial | ||
| Dial Color | Blue | Green |
3 fields are excluded from the differences view because one watch lacks comparable data. Use “All specs” to inspect those gaps.
Orient Sun & Moon and Seiko Spirit Green can overlap on price or use case, but the buying decision usually comes down to mechanical feel versus low-maintenance convenience, water-ready utility versus dressier everyday wear, entry price versus premium finishing or specs. They both touch the dress 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 Orient Sun & Moon if you prefer a mechanical watch experience and do not mind more upkeep; choose Seiko Spirit Green if you want a lower-maintenance daily watch.
Choose Orient Sun & Moon when
Orient Sun & Moon is a better fit for buyers who want more wrist presence, mechanical-watch enthusiasts, dress styling.
Choose Seiko Spirit Green when
Seiko Spirit Green is a better fit for smaller wrists, low-maintenance daily wear, dress styling.
Movement and upkeep
Orient Sun & Moon: automatic movement
Seiko Spirit Green: quartz movement
Orient Sun & Moon uses a automatic movement, while Seiko Spirit Green uses a quartz movement — that changes day-to-day ownership, upkeep, and the overall feel on the wrist.
Size and wearability
Orient Sun & Moon: 41.5mm · L2L 49.5mm
Seiko Spirit Green: 39.8mm · L2L 47mm · 82g
Their size profiles are relatively close, so fit comes down to shape, weight, and how each watch sits on your wrist.
Water resistance
Orient Sun & Moon: 50m
Seiko Spirit Green: 100m
Water resistance is a meaningful separator here — the higher-rated option gives more flexibility for swimming or rougher daily use.
Price and value
Orient Sun & Moon: $325
Seiko Spirit Green: $140
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
Orient Sun & Moon: dress
Seiko Spirit Green: dress
Both lean into a similar dress use case — the choice is more about fit, features, and price than category.
Crystal and materials
Orient Sun & Moon: mineral crystal · steel
Seiko Spirit Green: mineral crystal · steel
Materials are broadly similar, so finish, fit, and price will matter more than the materials list alone.
Seiko Spirit Green is often the value play at current pricing, while Orient Sun & Moon 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.
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Orient Sun & Moon
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Seiko Spirit Green
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Quartz and solar models are usually easier for grab-and-go use, while automatic and manual watches appeal more to buyers who enjoy the mechanical side of watch ownership.
Seiko Spirit Green — it is 47mm lug-to-lug versus 49.5mm, and lug-to-lug is what decides whether a watch overhangs a smaller wrist.
Seiko Spirit Green — it is rated 100m versus 50m, which is the difference between swimming confidently and only handling splashes.
Seiko Spirit Green is the value pick at roughly $185 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.
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