Accumatic A-652
1962–1969 · 10k Rolled Gold Plate / Stainless Steel · Automatic
About the Accumatic A-652
Made from 1962 through 1969, the Accumatic A-652 is a round automatic from Hamilton's Accumatic family, powered by the caliber 689A with 17 jewels. The case came in 10K yellow Rolled Gold Plate, offered with either a stainless steel back or in full 10K yellow RGP depending on the configuration. Three dial variants are known: a combined numeral and marker dial in white, the same layout in black, and an all-numeral version, all with applied gold numerals and applied gold markers and a sweeping seconds hand. The Accumatic line was Hamilton's primary American automatic offering through the 1960s, and the A-652 was a steady presence across most of the decade.
The seven-year production run means these surface with some regularity, but condition varies considerably. The applied gold numerals and markers hold up better than printed dials over time, but any corrosion or separation of the indices is worth scrutinizing closely before buying. Black dial examples tend to show their age differently than white dial versions, with the black finish sometimes developing an attractive patina and other times showing cloudiness or spotting near the edges.
From the Catalog
Hamilton listed the A-652 in 1962 at $75.00 on bracelet, describing it as a 10K yellow rolled gold plate case with stainless steel back, also available with a full numeral dial. By 1963 the strap price had come down to $55.00, and Hamilton noted the alternate full numeral dial as a distinguishing feature of the model.
Hamilton Catalog Images
1963
1964
1965
1966
1968
What to Look For
| Dial | Look closely at the applied gold numerals and markers. Any that are separating, tilting, or missing will affect both the look and the value. On the black dial variant, check for cloudiness, spotting, or fading near the rehaut. On white dials, look for yellowing or discoloration. Neither version can be cleaned without risking the surface, so what you see is what you get. |
| Crystal | These use an acrylic crystal, which scratches easily but can often be polished. Deep gouges that catch a fingernail are harder to address cleanly, so check for those specifically. |
| Movement | The 689A is an automatic, and lubricants dry out. Even a modest amount of friction from dried oil can be enough to stop the movement entirely. Put the watch on and let it wind from wrist motion. It should run continuously and keep reasonable time. If it needs constant coaxing to keep running, plan on a service. |
| Case | Rolled gold plate cases wear through to the base metal at the lugs and high-contact areas over time. Check the lug tips and case edges for brassing. The case back can be stubborn to open, so if there are pry marks around the edge, that is a sign of previous roughness. |
| Crown | Check that the crown screws in or pulls out smoothly without sticking or slipping. A crown that is hard to grip or feels loose in the stem may indicate wear or a stem that needs attention. Also worth noting: even though this watch was originally marketed as weatherproof, vintage seals should not be trusted and the watch should stay away from water. |
The Movement
The caliber 689A is a 17-jewel automatic movement made by Hamilton in the United States. It winds itself through a rotor that responds to normal wrist motion, so there is no need to hand-wind it during daily wear. It is a reliable and well-regarded movement from this era, though like any automatic approaching 60 years old, the lubricants inside have almost certainly dried out and a service will bring it back to its best performance.