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
ModerateCase covers 64% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 7.1 mm per side.
Watch B
Visual presence
ModerateCase covers 64% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 7.3 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 | Glycine Combat Sub | Tissot Seastar |
|---|---|---|
| Pricing | ||
| MSRPCombat Sub is $55 less at MSRP | $695 | $750 |
| Used Price (Low)Seastar is $8.9 less at the low end | $328 | $319 |
| Used Price (High) | $2,400 | $585 |
| 30-Day Trend | ↓ -17.8% | ↓ -16.4% |
| Used Price Range | $328 - $2,400 | $319 - $585 |
| Identity | ||
| Style | Diver, Tool, Sports | Diver, Sports |
| Dimensions | ||
| Thickness | N/A | 9.7mm |
| Lug to Lug | 42.5mm | 42mm |
| Movement | ||
| Movement | Automatic | Quartz |
| Case | ||
| Water ResistanceSeastar adds 100m water resistance | 200m (diving) | 300m (diving) |
3 fields are excluded from the differences view because one watch lacks comparable data. Use “All specs” to inspect those gaps.
Glycine Combat Sub and Tissot Seastar 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. They both touch the diver and sports 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 Glycine Combat Sub if you prefer a mechanical watch experience and do not mind more upkeep; choose Tissot Seastar if you want a lower-maintenance daily watch.
Choose Glycine Combat Sub when
Glycine Combat Sub is a better fit for mechanical-watch enthusiasts, diver styling.
Choose Tissot Seastar when
Tissot Seastar is a better fit for low-maintenance daily wear, diver styling.
Movement and upkeep
Glycine Combat Sub: automatic movement
Tissot Seastar: quartz movement
Glycine Combat Sub uses a automatic movement, while Tissot Seastar uses a quartz movement — that changes day-to-day ownership, upkeep, and the overall feel on the wrist.
Size and wearability
Glycine Combat Sub: 36mm · L2L 42.5mm
Tissot Seastar: 36mm · L2L 42mm · 114g
Their size profiles are relatively close, so fit comes down to shape, weight, and how each watch sits on your wrist.
Water resistance
Glycine Combat Sub: 200m
Tissot Seastar: 300m
Water resistance is a meaningful separator here — the higher-rated option gives more flexibility for swimming or rougher daily use.
Price and value
Glycine Combat Sub: $449
Tissot Seastar: $355
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
Glycine Combat Sub: diver
Tissot Seastar: diver
Both lean into a similar diver use case — the choice is more about fit, features, and price than category.
Crystal and materials
Glycine Combat Sub: sapphire crystal · steel
Tissot Seastar: sapphire crystal · steel
Materials are broadly similar, so finish, fit, and price will matter more than the materials list alone.
Tissot Seastar usually offers the lower entry price — confirm current listings because marketplace pricing can move quickly.
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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Glycine Combat Sub
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Tissot Seastar
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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.
Neither is clearly smaller: case width is 36mm vs 36mm. Pick on strap and looks instead — the size difference is not what will decide this for you.
Tissot Seastar — it is rated 300m versus 200m. Both are in the same broad bracket, so treat this as a tiebreaker rather than a deciding factor.
Tissot Seastar is the value pick at roughly $94 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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