Automatic K-502
1954 · Stainless Steel · Automatic
About the Automatic K-502
Made only in 1954, the Automatic K-502 is a stainless steel automatic from Hamilton's Automatic family, running on the caliber 661 with 17 jewels and a sweep seconds hand. The dial is two-toned with embossed silver markers and luminous dots, giving it a clean, purposeful look that suited the era's appetite for legible, no-fuss automatics. Hamilton offered it at two price points depending on whether it came on a bracelet or strap, with the bracelet configuration coming in at $75.00 and the strap version at $72.50. The related K-575 shares some DNA, but the K-502 has its own distinct dial character.
The embossed markers are worth examining closely on any example you come across. Because they sit proud of the dial surface, they can show wear or lose their finish in ways that painted or printed indices don't, and condition here varies more than you might expect. The two-toned dial finish also ages unevenly, so look for consistency across the surface rather than just checking the markers in isolation.
From the Catalog
Hamilton described the K-502 in 1954 as shock resistant, water resistant, and anti-magnetic, with embossed markers, luminous dots, and sweep seconds, qualities that positioned it as a capable daily wearer rather than a dress piece. At $72.50 on strap, it was a meaningful purchase for the era, roughly in line with other solid automatic options Hamilton offered that year.
Hamilton Catalog Images
1954
What to Look For
| Dial | Look hard at the embossed silver markers. The raised construction makes them vulnerable to polishing, replating, or wear that flattens their profile. The two-toned finish should transition cleanly, not fade patchily or show signs of moisture damage beneath the surface. |
| Crystal | Check for chips, deep scratches, or a replacement crystal that doesn't sit flush. A crisp, original crystal makes a real difference on a watch with a clean dial like this. |
| Movement | Ask whether the caliber 661 has been serviced. Oil that has dried and thickened over decades of sitting can build up enough friction to stop an automatic dead, and a watch that winds and runs on the wrist today may not tomorrow if it hasn't been through a proper service. |
| Case | The stainless steel case should show honest wear, not buffing. Swept lugs in particular lose their definition fast when polished, and sharp lug lines are one of the things that separate a nice example from a great one. Also check the case back area for pry marks, as these cases can invite misguided opening attempts from the back. |
| Crown | Make sure the crown threads smoothly and seats properly. A loose or damaged crown on a watch originally rated water resistant means the seal is almost certainly compromised, and vintage watches should not be treated as waterproof regardless of original specs. |
The Movement
The caliber 661 is a 17-jewel automatic that Hamilton used across several of its 1950s models. It winds via a rotor as the watch moves on the wrist, so it doesn't need daily hand-winding under normal wear conditions. It's a solid, serviceable movement with a good track record, though like any automatic of this age it benefits from a full service to run at its best.