Accumatic A-507
1965–1972 · Stainless Steel · Automatic
About the Accumatic A-507
The Accumatic A-507 ran from 1965 through 1972, making it one of the longer-lived models in the Accumatic family and one of the few that bridged Hamilton's Lancaster-era production and its Swiss transition. It runs on the caliber 689A, a 17-jewel automatic, housed in a 33mm stainless steel case with a sweep seconds hand and date at 3 o'clock. The A-507 sits in the more accessible end of the Accumatic lineup, a no-frills round case with clean proportions that held up across nearly eight years of production. Dauphine hands appear on examples produced from 1968 onward, giving collectors a rough way to date what they're looking at.
Dial variation is where this model gets interesting. The base configuration is a white dial with embossed silver Arabic numerals at 12, 3, 6, and 9, but examples also turn up with a textured grooved finish, applied numerals, luminous dots at the quarter positions, and different hand treatments including luminous hands. A black dial variant was also offered, so the A-507 covers more visual ground than its straightforward profile might suggest. Condition on the white dials can vary meaningfully, so it's worth looking closely before assuming any particular example matches catalog spec.
From the Catalog
Hamilton offered the A-507 in 1965 at $59.95 on a strap, with the bracelet version priced at $65 in 1966. The catalog noted a stainless steel case and also listed an alternate black dial version for buyers who wanted a darker look.
Hamilton Catalog Images
1965
1966
1968
1970
What to Look For
| Dial | Confirm whether the dial matches the variant you expect. White dials can show yellowing or discoloration at the edges. On examples with printed details, know that the lacquer is fragile and any attempt to clean the dial risks separating the printing. Check that the date window at 3 o'clock is clean and that the date disc color matches the dial. |
| Crystal | The A-507 takes an acrylic crystal. Light surface scratches are normal and can be polished out, but look for deep gouges or crazing that would require replacement. A hazy or crazed crystal is worth factoring into what you're willing to pay. |
| Movement | The 689A should wind from wrist motion and keep running without any need for shaking or manual winding. If it only runs when agitated, dried lubricants are the likely cause after fifty-plus years. Listen for any irregular ticking or stuttering, which can point to worn parts or debris in the gear train. |
| Case | Stainless steel holds up well, but check the lugs for wear-through at the edges and look at the caseback for tool marks from previous openings. Caseback threads on vintage Hamiltons can be tight or slightly damaged, so a scored or stripped back is worth noting. The original weatherproof rating is not a reason to expose the watch to moisture today. |
| Crown | Make sure the crown screws in or seats properly and that date-setting and hand-setting functions engage cleanly. A loose or unresponsive crown can indicate a worn stem or setting lever, which adds to a service bill. |
The Movement
The caliber 689A is a 17-jewel automatic movement that winds from wrist motion through a rotor, so there is no need to hand-wind it under normal wearing conditions. It includes a date complication and runs with a sweep seconds hand. The 63 designation that sometimes appears alongside it refers to a related Swiss-made variant used during Hamilton's transition period, both sharing the same fundamental architecture.