Longines Admiral HF Automatic Ref. 431.3 | NOS | 1976 | Rare Vintage Tag

Offered for sale is an exceptional Longines Admiral HF Automatic Ref. 431.3, produced circa 1976, presented in genuine New Old Stock (NOS) condition.

This rare vintage timepiece belongs to Longines’ celebrated High-Frequency (HF) era, a period defined by technical innovation and precision engineering during the 1970s. Admiral HF models are increasingly sought after by collectors for their mechanical significance, distinctive design language, and limited survival in original condition.

This example is preserved in original “naked configuration”, retaining its factory originality without aftermarket modifications, and is accompanied by its original Longines hang tag. Such untouched examples are extremely rare on today’s market, particularly in NOS condition.

The watch features a distinctive case measuring approximately 39 x 41 mm, giving it a subtle elliptical and architectural profile on the wrist, characteristic of certain Longines designs of the era. The proportions offer a strong wrist presence while maintaining vintage elegance.

Powered by a Longines High-Frequency automatic movement, this reference reflects the brand’s pursuit of enhanced accuracy during the pre-quartz transition period. HF calibers are appreciated for their technical importance and smoother mechanical performance compared to standard frequency movements of the time.

Specifications

Brand: Longines

Model: Admiral HF Automatic

Reference: 431.3

Year: Circa 1976

Condition: New Old Stock (NOS)

Movement: High-Frequency Automatic (Longines HF series)

Case Dimensions: approx. 39 x 41 mm

Case Material: Stainless Steel

Crystal: Acrylic (period correct)

Configuration: Original factory “naked” configuration

Accessories: Original Longines tag only

Style: Vintage integrated sports-elegant design

Collectors status: Rare HF reference

Collector’s Note

The Longines Admiral HF represents an important chapter in Swiss watchmaking history, reflecting the brand’s innovation in high-frequency technology during the 1970s. Surviving examples in NOS condition are exceptionally scarce, particularly in original untouched configuration.

This piece stands out for its originality, technical significance, and strong collector appeal, making it an excellent acquisition for enthusiasts of vintage Longines and historically important mechanical watches.