Head-to-Head Comparison

Longines Master Collection Moonphase vs Tissot Seastar 1000 Automatic

Longines's dress watch meets Tissot's diver

Quick Verdict

The Tissot Seastar 1000 Automatic ($500–$1,000) delivers ETA/Tissot Automatic technology in the tier below the Longines Master Collection Moonphase ($2,500–$5,000). The Seastar 1000 Automatic measures 40mm and is rated 300m (30 ATM). The Master Collection Moonphase justifies its premium with Swiss Made heritage and Automatic Caliber L899. Both represent excellent choices in the luxury watch category.

LonginesMaster Collection Moonphase$2,500–$5,000 Check price TissotSeastar 1000 Automatic$500–$1,000 Check price

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Longines

Master Collection Moonphase

$2,500–$5,000

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Tissot

Seastar 1000 Automatic

$500–$1,000

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Specifications Compared

Feature	Longines Master Collection Moonphase	Tissot Seastar 1000 Automatic
Price	$2,500–$5,000	$500–$1,000
Case Size	40mm	40mm
Movement	Automatic Caliber L899	Automatic Powermatic 80 (Caliber 80.111)
Caliber Type	Automatic (ETA A31.L91 base)	ETA/Tissot Automatic
Power Reserve	72 Hours	80 Hours
Water Resistance	30m (3 ATM)	300m (30 ATM)
Crystal	Sapphire Crystal	Sapphire Crystal
Case Material	Stainless Steel	Stainless Steel
Origin	Swiss Made	Swiss Made

Category-by-Category Analysis

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Design & Aesthetics

Edge: Draw

Longines's design language vs Tissot's approach

The Longines Master Collection Moonphase features a Stainless Steel case at 40mm with Sapphire Crystal protection. The Tissot Seastar 1000 Automatic offers Stainless Steel construction at 40mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.

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Movement & Performance

Edge: Tissot

Automatic Caliber L899 vs Automatic Powermatic 80 (Caliber 80.111)

The Master Collection Moonphase runs the Automatic Caliber L899 (Automatic (ETA A31.L91 base), 72 Hours power reserve) at 25,200 vph (3.5 Hz) frequency. The Seastar 1000 Automatic uses the Automatic Powermatic 80 (Caliber 80.111) (ETA/Tissot Automatic, 80 Hours reserve) at 21,600 vph (3 Hz). The Seastar 1000 Automatic offers a longer power reserve.

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Wearability & Fit

Edge: Draw

40mm vs 40mm — different wrist presence

At 40mm, the Master Collection Moonphase is similarly sized compared to the Seastar 1000 Automatic at 40mm. Water resistance differs: 30m (3 ATM) vs 300m (30 ATM).

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Value & Cost of Ownership

Edge: Tissot

Tissot sits in the lower tier

The Longines Master Collection Moonphase sits at $2,500–$5,000 and the Tissot Seastar 1000 Automatic at $500–$1,000. On the specs that outlast any price: the Master Collection Moonphase uses Sapphire Crystal with 72 Hours, against Sapphire Crystal and 80 Hours on the Seastar 1000 Automatic. Service intervals are typically 5-7 years for both.

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Water Resistance

Edge: Tissot

30m (3 ATM) vs 300m (30 ATM)

The Master Collection Moonphase is rated to 30m (3 ATM) while the Seastar 1000 Automatic handles 300m (30 ATM). The Seastar 1000 Automatic offers superior water resistance.

Our Verdict

Longines

Master Collection Moonphase

Choose the Longines Master Collection Moonphase if you prioritize Automatic (ETA A31.L91 base) engineering, Swiss Made craftsmanship, and 30m (3 ATM) water resistance. At $2,500–$5,000, it delivers Automatic Caliber L899 with 72 Hours power reserve.

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Tissot

Seastar 1000 Automatic

Choose the Tissot Seastar 1000 Automatic if you value ETA/Tissot Automatic technology, Swiss Made heritage, and 40mm proportions. At $500–$1,000, the Automatic Powermatic 80 (Caliber 80.111) with 80 Hours power reserve makes it a compelling choice.

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The Bottom Line

The Longines Master Collection Moonphase and Tissot Seastar 1000 Automatic represent two distinct approaches to fine watchmaking — the Longines bringing Swiss Made tradition while Tissot delivers Swiss Made engineering.

Frequently Asked Questions

Neither is objectively better — they serve different preferences. The Longines Master Collection Moonphase ($2,500–$5,000) offers Automatic Caliber L899 with 72 Hours power reserve, while the Tissot Seastar 1000 Automatic ($500–$1,000) features Automatic Powermatic 80 (Caliber 80.111) with 300m (30 ATM) water resistance. Choose based on your priorities: Swiss Made craftsmanship vs Swiss Made engineering.

The Tissot Seastar 1000 Automatic offers better upfront value, sitting a tier lower at $500–$1,000. However, the Longines Master Collection Moonphase may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The Master Collection Moonphase at 40mm with 30m (3 ATM) water resistance handles everyday situations. The Seastar 1000 Automatic at 40mm with 300m (30 ATM) is similarly capable. Both use Sapphire Crystal, which resists scratches well.

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How This Page Was Made

Our comparisons are generated from a hand-maintained specification database and reviewed under our editorial standards. We use AI tools to assemble pages from that data. We don’t invent specs: every number traces back to the database, and when we correct an entry, the fix is applied site-wide. As an Amazon Associate, The Horologist earns from qualifying purchases.