Accumatic A-608
1968–1969 · 10k Rolled Gold Plate · Automatic
About the Accumatic A-608
Made from 1968 through 1969, the Accumatic A-608 is a clean, round-cased automatic from Hamilton's long-running Accumatic family, powered by the caliber 689A. The case is 10K yellow RGP with a silver dial carrying applied gold numerals at 3, 6, 9, and 12, applied gold markers at the remaining positions, and a sweep seconds hand. The Accumatic line was Hamilton's core automatic offering through the 1960s, and the A-608 represents the more accessible end of the range in terms of styling, keeping things straightforward and legible.
Applied gold numerals and markers hold up well over time if the watch has been kept away from moisture, but check closely for any separation or loss at the edges, particularly around the 12 and 6 positions where wear tends to concentrate. Silver dials from this era can develop a light patina that many collectors find appealing, though heavy oxidation or spotting is worth factoring into any purchase decision. The fact that this model appeared in a single catalog year makes clean, complete examples a little harder to come by than the longer-running Accumatic references.
From the Catalog
Hamilton's 1968 catalog listed a 14K yellow gold version of this reference at $140, suggesting the RGP variant at $99.50 was positioned as the more accessible entry point into the same basic design.
Hamilton Catalog Images
1968
What to Look For
| Dial | Look closely at the applied gold numerals and markers under good light. Check for any separation, missing pieces, or adhesive residue around the edges. The silver dial surface can show spotting or oxidation, especially if moisture got past the crystal at any point. Light patina is generally acceptable; heavy discoloration or watermark rings are not. |
| Crystal | The crystal should be clear and free of deep scratches that scatter light across the dial. Minor surface scratches on acrylic can often be polished out, but a cracked or badly crazed crystal needs replacement before the watch is worn. |
| Movement | The 689A should wind from wrist motion and keep the watch running without needing constant encouragement. A movement that stops when set down, or that requires shaking to restart, is telling you the lubricants have dried up and a service is overdue. |
| Case | On a 10K RGP case, look at the lugs and case flanks for wear-through to the base metal, which shows up as a brighter, slightly different color beneath the gold layer. Some wear is expected on a watch of this age, but heavy exposure of base metal on the lugs affects both appearance and long-term durability. |
| Crown | The crown should feel smooth and positive when setting the time, with no grinding or slipping. A worn or replaced crown that doesn't match the case finish is worth noting. Also keep in mind that even though the A-608 was rated weatherproof originally, that rating does not hold on a vintage watch and water exposure should be avoided. |
The Movement
The caliber 689A is a 17-jewel automatic movement that winds from the motion of the wearer's wrist through a bidirectional rotor system. It's a reliable workhorse from Hamilton's domestic production era, compact and well-suited to the round case format. Like most movements of this vintage, the 689A benefits considerably from fresh lubrication, since oil that has dried over five-plus decades creates enough friction to affect timekeeping or stop the watch entirely.