
RDSChicago introduces the Seiko 6119-6400 "UFO," a vintage 5 Sports automatic diver known for its distinctive case shape. This article delves into the watch's specifications and its place within Seiko's historical offerings. The discussion highlights how this vintage piece continues to resonate with collectors today.
The Seiko 6119-6400 "UFO" (produced in the 1970s) is a vintage 5 Sports 70m automatic diver characterized by its 43mm cushion-shaped case, inner rotating bezel, and 6119 automatic movement. It features a 21-jewel movement, bilingual day/date complication, and typically has a lug width of 19mm.
Case Size: 43mm diameter, cushion style, often referred to as "UFO" due to its shape.
Movement: Seiko Caliber 6119 automatic (21 jewels).
Functions: Hours, minutes, seconds, date, day (often English/Arabic or English/Roman), and inner rotating bezel.
Case Material: Stainless Steel.
Lug Width: 19mm.
Thickness: Approximately 13.5mm.
Water Resistance: 70 meters (7 ATM) - Note: Vintage water resistance is not guaranteed without professional service.
Crystal: Hardlex (usually polished, sometimes replaced).
Dial Colors: Common in black, orange, and brown, often with matte texture and luminous markers.
Distinctive Features:
The "UFO" Case: Wide bezel over a tapered case body, giving it a flying saucer appearance.
Inner Bezel: A rotating bezel inside the crystal, controlled by the crown.
Crown Position: Recessed at the 4 o'clock position.
The watch was a popular "5 Sports" model designed for rugged daily wear. Original models often had a brushed circular finish on the case and a stainless steel bracelet

The Calatrava reference 6119G-001 represents a contemporary interpretation of a classic dress watch, distinguished by its hobnail bezel. This particular reference, launched in 2021, updates the design language of previous Calatrava models while retaining core aesthetic principles. It is positioned as a refined option for collectors seeking a modern dress watch with traditional finishing.
This reference features a white gold case, measuring 39mm in diameter and 8.43mm in thickness. It houses the manual-wind caliber 30-255 PS, which provides a power reserve of 65 hours. The watch is fitted with a sapphire crystal and offers water resistance up to 30 meters. The dial is charcoal gray with a subtle grained texture.
Appealing to collectors who appreciate understated design and mechanical precision, the 6119G-001 offers a blend of traditional watchmaking and contemporary sizing. Its hobnail bezel is a signature element, linking it to historical models while presenting a fresh appearance within the current Calatrava collection. It is available in both white gold and rose gold variants.
The historical flying saucer inspiration for the Recraft series that got quietly launched and dropped some 9 or so years ago. Here the modern interpretation of the same 😊👋🏻
Looks great on that distressed leather strap!!
Rolex has a handful of references, and they certainly do them well. But the variety and sheer number of Seiko references from this period is so interesting to me. Seiko designers in the 1960’s and 1970’s must have kept themselves quite busy!
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