Accumatic A-604
1965 · 10k Rolled Gold Plate · Automatic
About the Accumatic A-604
Made only in 1965, the Accumatic A-604 is a clean, round-cased automatic from Hamilton's Accumatic family, running on the caliber 694A with 17 jewels and a sweep seconds hand. The case is 10K yellow Rolled Gold Plate, and the dial is two-toned silver with applied baton markers. The A-604 is part of Hamilton's broader Accumatic lineup, which brought automatic winding to a range of accessible price points throughout the 1960s.
Finding a clean example means paying close attention to the dial, since the two-toned silver finish can show age unevenly and the applied baton markers are worth checking for separation or loss. The 694A is a solid, serviceable movement, but after 60 years any example you come across has almost certainly been sitting with dried lubricants, so assume it needs a service unless the seller can document recent work.
From the Catalog
Hamilton offered the A-604 in 1965 at $79.50 on a strap, with a bracelet configuration available at a slightly higher price point, positioning it as a mid-range automatic with a dressy, polished look for everyday wear.
Hamilton Catalog Images
1965
What to Look For
| Dial | The two-toned silver dial is the first thing to scrutinize. Look for even tone across both zones with no discoloration, spotting, or moisture damage at the edges. Check each applied baton marker carefully for separation or misalignment, since markers that have shifted or started to detach are a restoration cost to factor in. |
| Crystal | Confirm the crystal is present and intact with no deep scratches or chips. A replacement crystal on a watch this age is not unusual, but make sure any replacement fits properly without gaps around the edge. |
| Movement | Dried lubricants are a real concern on any watch of this age, and even a small amount of friction buildup can stop a movement that otherwise looks fine. The watch should run continuously from wrist motion without needing to be hand-wound repeatedly to stay going. If it stops, stutters, or runs only intermittently, budget for a full service. |
| Case | The 10K yellow rolled gold plate case should have its finish intact without heavy wear through to the base metal, particularly on the lugs and caseback edges where contact is greatest. Swept lugs on a case this age can show polishing damage if a previous owner tried to buff out scratches, so look for crisp lug edges rather than softened, overpolished lines. |
| Crown | The crown should screw or push in smoothly and feel secure with no wobble. A loose or damaged crown can affect winding and hand-setting, and replacements are not always easy to match correctly on a watch this age. |
The Movement
The caliber 694A is a 17-jewel automatic that winds from the motion of the wrist through a bidirectional rotor system, meaning it keeps itself wound during normal wear without any manual intervention. It drives a sweep seconds hand, giving the dial a clean, uninterrupted look. The 694A is a reliable workhorse from Hamilton's American-era automatic production and responds well to a proper service.