1 in stock

Croton Nivada Gretchen Aquamatic Stainless Steel ETA Cal. 2451

A vintage Croton Nivada Grenchen Aquamatic from the 1960s, featuring the desirable dual-signed dial. This timepiece is housed in a classic stainless steel case. The original silver dial has aged to a heavy, warm, “stardust” patina and features a classic “Explorer-style” layout with printed Arabic numerals at 3, 6, 9, and 12, mixed with applied faceted dagger indices. It retains its original dauphine handset and is powered by the robust ETA Caliber 2451 automatic movement.

1 in stock

1 in stock

General

Brand

Model Line

Aquamatic

Manufactured

Switzerland

Department

Men

Dial Color

White

Case

Case Shape

Round

Bezel

Fixed

Case Material

Stainless Steel

Case Width

34mm

Case Height

40mm

Strap / Bracelet

Lug Width

18mm

Strap Material

Leather

Strap Color

Tan

Clasp

Buckle

Max Wrist Size

8.5"

Movement

Movement

Automatic

Caliber

ETA 2451

Accuracy

>15 seconds

The movement showed a daily accuracy deviation ranging from 0 to 15 seconds across six positions.

Extras

Warranty Every watch sold by Ottuhr comes with a 1-year mechanical warranty. Select pieces may also include additional guarantees or extended coverage.

1-Year Ottuhr Warranty

Original Box

No

Original Papers

No

Overview

While many collectors today chase the usual big-name suspects, the real “insider” brands from the mid-century are often the most compelling. Croton, as the U.S. importer for the formidable Swiss manufacture Nivada Grenchen, was at the absolute forefront of this, building some of the toughest, most reliable, and, frankly, coolest tool watches of the era. Their “Aquamatic” line was the direct answer to the Omega Seamaster—a watch built for an active life.

The “Aquamatic” name itself tells the whole story: a robust, “Aqua” waterproof case paired with a reliable “Automatic” movement. The engine in this watch is the legendary ETA Caliber 2451, one of the great “tractor” movements of the 1960s. It’s a 17-jewel workhorse, renowned for its simplicity, durability, and reliability.  The perfect choice for a watch that was truly meant to be worn and used every single day.

This particular example is a fantastic and early representation of that partnership. It features the sought-after “Croton Nivada Grenchen” dual-signed dial, a clear badge of that critical Swiss-American alliance. The dial layout is also a stone-cold classic: an “Explorer-style” configuration with printed Arabic numerals at the quarters (3, 6, 9, and 12), mixed with applied faceted dagger markers. It’s a supremely legible and balanced, military-inspired design.

Timing: The watch has been measured with a timegrapher at six different positions. The rate, amplitude, and beat error are within acceptable ranges.

Functions: All functions including the crown winding, time setting, etc are working as expected.

Integrity: The movement shows no signs of damage, rust, or corrosion, with all components appearing clean and well-maintained.

Authenticity: Each timepiece is evaluated and authenticated in-house. This watch is guaranteed to be correct to its manufacturer and time period.

Warranty: This timepiece includes a 1-year mechanical warranty, activated upon the date of purchase. 

Shipping: This timepeice includes complimentary insured shipping within all 50 states. 

Returns: If, for any reason, you are not entirely satisfied with your purchase, you may return the product for a full refund within 30 days from the date you received or signed for the item.

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