Vintage Croton Nivada Grenchen Antarctic 7230

This is a vintage mid-century wrist watch, identified as a Croton Nivada Grenchen 'Antarctic' model 7230. The piece features a round case constructed from 10k gold (likely gold-filled or gold plate based on typical period manufacturing for this reference). The dial is a sunburst silver or light champagne tone, characterized by its distinctive applied 'triangular' or dagger-style hour markers that point toward the center, a hallmark of 1950s and 1960s horological design. The hands appear to be dauphine-style, including a central sweep seconds hand. The crystal shows significant signs of age, with visible surface scratches and 'crazing' or micro-cracking across the acrylic profile, which obscures the dial clarity. The lugs are thick and integrated into the case design, showing wear and some oxidation/patina consistent with a tool watch of this era. The crown is present and appears to be of the correct small, knurled variety. Historically, the Antarctic line was celebrated for its durability, famously used during Admiral Byrd's Operation Deep Freeze in the mid-1950s. The overall condition is 'fair' to 'good' for a vintage piece, showing heavy character, authentic patina, and no immediate signs of catastrophic mechanical damage, though it would require professional servicing and a crystal replacement for optimal presentation.