New Arrivals: 1947 Gruen Veri-Thin Gold Sweep Second Tank
This is a beautifully preserved late-1940s Gruen Veri-Thin tank wristwatch, freshly serviced and regulated, and representing one of Gruen’s most important postwar dress-watch designs. Compact, elegant, and mechanically refined, it captures the restrained sophistication that defined American watchmaking in the years immediately following World War II.
This is a beautifully preserved late-1940s Gruen Veri-Thin tank wristwatch, freshly serviced and regulated, and representing one of Gruen’s most important postwar dress-watch designs. Compact, elegant, and mechanically refined, it captures the restrained sophistication that defined American watchmaking in the years immediately following World War II.
Case, Dial & Aesthetic
The 26x26mm square tank case is executed in 10K gold fill with a steel back, factory marked 552/425, and overplated in 14K gold to restore its bright, period-correct appearance while preserving the original case structure. The proportions are classic mid-century Gruen, with a short 33mm lug-to-lug that wears elegantly on smaller wrists. The original Gruen dial features applied Arabic numerals and a clean minute track, showing an even, attractive patina consistent with age. An original glass crystal has been professionally polished and restored, maintaining the correct vintage profile and clarity.
Movement: Gruen 425SS Veri-Thin
Powering this watch is the Gruen Caliber 425SS, part of the celebrated Veri-Thin family of manual-wind movements. Introduced in the immediate postwar period, the Veri-Thin architecture was designed to achieve a slimmer overall profile without compromising durability or serviceability.
Winding: Manual Wind
Jewels: 17
Frequency: 18,000 BPH
Origin: Swiss Made
Complications: Sweep Second
Condition & Service
This watch has been fully serviced and regulated and is running well. The original signed Gruen crown has been retained and replated. Overall presentation is excellent, with light, honest signs of age appropriate to a watch of this era and careful attention paid to preserving original components.
Specs & Details
Line: Veri-Thin
Reference: 552/425
Year: 1947–1948
Case: 10K Gold Filled (overplated in 14K) Clamshell / Stainless Steel Back
Case Dimensions: 26x26mm
Lug to Lug: 33mm
Thickness: 11mm
Lug width: 16.3mm
Recommended Band Size: 16mm
Movement: Gruen 425SS
Features: Original Crystal/Restored, 14K Gold Overplate, Original Signed Crown
Why This Watch Matters
Gruen’s Veri-Thin line represents a high point in American mechanical watch design, combining thoughtful engineering with timeless aesthetics. In a market dominated by round cases, this square tank stands out as a deliberate, confident design choice. Freshly serviced and immediately wearable, it offers a compelling blend of historical significance, everyday practicality, and understated mid-century style.
Watch band not included with purchase. You will need a 16mm band to pair with this watch. Please see this page for more information.