Automatic K-301
1954 · 10k Solid Yellow Gold · Automatic
About the Automatic K-301
Made only in 1954, the Automatic K-301 is part of Hamilton's broader Automatic family from the mid-1950s, a period when Hamilton was building out its domestic automatic lineup in earnest. The case is 10K yellow gold with a clean round profile and swept lugs, and inside sits the caliber 661, a 17-jewel automatic with a sweep seconds hand. The dial is silver with applied 18K gold markers and no numerals, keeping the look spare and uncluttered. Hamilton marketed it with water resistance, shock resistance, and anti-magnetic protection, which were genuine selling points for an automatic at this price in 1954.
Finding one in solid shape takes some patience. The silver dial with applied gold markers can show age gracefully, but watch for any burn marks around the dial edges from proximity to the hands, which is a known issue on this family of watches. The gold case holds up well compared to Gold Filled examples, but any sign of attempted case back prying is worth scrutinizing closely.
From the Catalog
Hamilton described the K-301 in 1954 as featuring a natural gold case, 18K gold markers, sweep seconds, and a combination of water resistance, shock resistance, and anti-magnetic protection. It retailed for $135.00 with a leather strap.
Hamilton Catalog Images
1954
What to Look For
| Dial | Look carefully around the edges of the dial for any discoloration or burn marks from the hands sitting close to the surface over decades. The applied 18K gold markers should be clean and seated flat with no separation or pulling away at the edges. |
| Crystal | Check for chips, crazing, or deep scratches. A worn crystal is replaceable, but it affects how the dial reads and can signal general neglect. |
| Movement | Ask about service history. The caliber 661 is an automatic, and dried oil creates enough friction to stop it entirely on examples that haven't been serviced in years. A watch that winds by motion but runs erratically is a likely candidate for a full service. |
| Case | Inspect the case back edge carefully for pry marks or deformation. This case opens through the crystal side, not the case back, and attempts to force the back are a common mistake that leaves visible damage. |
| Crown | The crown should seat firmly and turn smoothly. Any wobble or resistance can point to a worn stem or a crown that has been replaced with an ill-fitting part. |
The Movement
The caliber 661 is an American-made 17-jewel automatic that winds through a rotating oscillating weight, meaning normal wrist motion keeps it running without manual winding. It drives a sweep seconds hand, which gives the dial a clean, continuous motion rather than a ticking hand at the 6 o'clock position. It is a capable movement, but like any vintage automatic it rewards regular servicing to keep the oils fresh and the rotor bearing clean.