Automatic K-410
1958–1960 · 10k Yellow Gold Filled · Automatic
About the Automatic K-410
Made from 1958 through 1960, the Automatic K-410 runs on Hamilton's caliber 661 and comes in a 10K yellow Gold Filled round case. It's part of Hamilton's Automatic family, a broad line of self-winding models that expanded significantly through the late 1950s as automatic movements became the expectation rather than the exception. The dial is white with embossed yellow Roman numerals, applied gold markers at the even-hour positions, luminous dots, and a pearled track around the perimeter. Sweep seconds complete the look.
The embossed Roman numeral dial is worth a close look when evaluating one of these. The raised lettering and markers can accumulate grime or show wear differently than a printed dial, and original condition dials with intact luminous material and a clean pearled track are genuinely satisfying to find. Hamilton listed the K-410 with a waterproof rating originally, but any vintage watch should be treated as non-water-resistant at this point, and finding one that has stayed dry over the decades is part of what you're hoping for.
From the Catalog
Hamilton offered the K-410 on bracelet or strap in 1958, pricing the bracelet version at $100 and the strap version at $95. The catalog called it waterproof and highlighted the embossed Roman numeral and marker dial with luminous dots and a pearled track as its defining visual features.
Hamilton Catalog Images
1958
1959
1960
What to Look For
| Dial | Look closely at the embossed Roman numerals and the pearled track. The raised numerals can trap debris or show uneven wear, and the luminous dots often age to a warm cream color. A dial that's stayed clean and undamaged is one of the better things this watch has going for it. |
| Crystal | Check for chips, crazing, or deep scratches. On a round gold-filled case from this era, crystal replacement is usually straightforward, but a clean original is always preferable. |
| Movement | Ask whether the caliber 661 has been serviced recently. Oil dries and thickens over time, and enough friction can build up to bring an automatic to a stop. A watch that winds and runs steadily for a full day is a good sign, but a proper cleaning and oiling is the only real answer. |
| Case | The 10K gold-filled case should have a warm, even tone across the lugs and case body. Check for wear-through at the high contact points, particularly the lugs and case back edges, where the gold layer thins first. |
| Crown | The original waterproof rating depended on seals that are decades old and should not be trusted. Make sure the crown threads smoothly and seats fully without wobble or resistance, and keep this watch away from water regardless of its original rating. |
The Movement
The caliber 661 is a 17-jewel automatic that winds through a bidirectional rotor, so normal wear keeps it running without manual intervention. It's a solid mid-century movement, compact and reliable when properly serviced. Examples that haven't been cleaned in years can develop enough resistance from dried and thickened oil to stop the movement outright, so service history matters.