# Seiko Prospex Sea 55th Anniversary LE-1100 Review by A.I. WatchMetrics

## Watch Summary
The Seiko Prospex Sea 55th Anniversary LE-1100 is a limited edition diver's watch celebrating 55 years of the iconic 1965 62MAS, blending vintage cushion-shaped design with modern upgrades like a 44.8mm stainless steel case, bold Lumibrite lume for low-light legibility, and the robust 6R35 automatic movement offering 70 hours of power reserve, ideal for serious dive enthusiasts and collectors who appreciate historical significance paired with tool-watch reliability.

## Overall Watch Rating: 7.6/10.0

**Dials & Design Metric (9.2/10.0)** - Its vintage-inspired cushion profile, textured black dial, and superlative Lumibrite application deliver legibility and charm surpassing most microbrand divers.
**Material Metric (9.0/10.0)** - Grade 5 titanium-like durability from sapphire crystal with AR coating and robust stainless steel construction rivals entry-level luxury divers like the Tudor Black Bay.
**History & Innovation Metric (8.8/10.0)** - Rooted in Seiko's groundbreaking 62MAS legacy with thoughtful updates like extended power reserve, it stands alongside anniversary pieces from Omega.
**Movement Metric (8.5/10.0)** - The 6R35's 70-hour reserve, reliable accuracy, and manual winding capability perform on par with Sellita SW200-based movements in mid-tier watches.
**Versatility Metric (8.4/10.0)** - Excels across sports, adventure, and casual scenarios with its rubber strap and 300m rating, though large sizing limits formal wear like a Blancpain Fifty Fathoms.
**Functions Metric (7.6/10.0)** - Core timekeeping, date, and dive bezel provide solid utility comparable to standard Prospex models.
**Rarity Metric (7.3/10.0)** - Limited to 1,100 pieces, it offers collectible appeal similar to other sub-5,000 run Seiko LEs but not ultra-exclusive like 100-piece runs.
**Brand Metric (5.5/10.0)** - Seiko's Prospex line delivers dependable quality akin to Citizen or Hamilton, solid for the mid-tier but lacking luxury prestige.
**Complications Metric (4.1/10.0)** - Simple date window matches basic ETA 2824-equipped divers without advanced features.

## Total Performance Score (TPS): 7.5

## WM Collector Grade: B+

## Performance Insights: Excels in design, materials, and heritage with a capable movement, while brand prestige and complications lag; strong value trading above its $2,800 implied price due to limited edition appeal.

## TPS Interpretation: Solid Value: The watch punches above its price class with historical depth and pro-level dive specs ideal for enthusiasts.

## Watch Data
[https://www.seikowatches.com/content/dam/seiko-global/us/en/prospex/products/sbdc117/sbdc117_front.jpg] - Front; [https://www.seikowatches.com/content/dam/seiko-global/us/en/prospex/products/sbdc117/sbdc117_back.jpg] - Back; [https://www.ablogtowatch.com/wp-content/uploads/2020/10/Seiko-Prospex-Divers-Watch-55th-Anniversary-SBDC117-lume.jpg] - Lume glowing strongly on dial and bezel; [62MAS 55th Anniversary LE] - Seiko Prospex Sea 55th Anniversary LE-1100; [Seiko] - Prospex Diver Scuba 55th Anniversary Limited Edition SBDC117; [Japan] - Japan; [https://www.seikowatches.com/us-en/prospex-divers-watch-55th-anniversary-limited-edition-sbdc117] - https://www.seikowatches.com/us-en/prospex-divers-watch-55th-anniversary-limited-edition-sbdc117; [N/A] - N/A; [Mechanical - Automatic] - Mechanical - Automatic; [6R35] - 6R35; [0] - 0; [Limited to 1,100 pieces worldwide, faithful recreation of the 1965 62MAS diver with modern 70-hour power reserve and enhanced lume.] - Limited to 1,100 pieces worldwide, faithful recreation of the 1965 62MAS diver with modern 70-hour power reserve and enhanced lume.; [44.8] - 44.8; [50.2] - 50.2; [13.7] - 13.7; [22] - 22; [300] - 300; [70] - 70; [21600] - 21600; [Lumibrite] - Lumibrite; [24] - 24; [Stainless Steel] - Stainless Steel; [Sapphire dual-curved with AR] - Sapphire dual-curved with AR; [Unidirectional rotating aluminum black with luminous dot] - Unidirectional rotating aluminum black with luminous dot; [Solid screw-down] - Solid screw-down; [Screw-down] - Screw-down; [Silicone rubber black] - Silicone rubber black; [Cushion] - Cushion; [Black with applied luminous indices] - Black with applied luminous indices; [Yes] - Yes; [Yes] - Yes; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [Yes] - Yes; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [Yes] - Yes; [Yes] - Yes; [Yes] - Yes; [Yes] - Yes; [No] - No; [Yes] - Yes; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [7.5] - 7.5; [B+] - B+; [2800] - 2800;

**A.I. WatchMetrics Review v37.4 Grok 4 Fast. December 19, 2025.**