Accumatic A-650
1961–1963 · 10k Rolled Gold Plate / Stainless Steel · Automatic
About the Accumatic A-650
The Accumatic A-650 was produced from 1961 through 1963, placing it in the earlier years of Hamilton's Accumatic line, which brought automatic winding to Hamilton's domestic catalog in an accessible, wearable package. It runs on the caliber 689A, a 17-jewel automatic movement, housed in a round 10K yellow Rolled Gold Plate case with a stainless steel back. The dial is two-toned and features embossed gold numerals and markers, with numerals at 6 and 12 and luminous dots serving as minute markers, giving the watch a layered, textured look that photographs don't always do justice.
Embossed dials like this one hold up better than printed ones over time, but the two-tone finish can show age unevenly, so close inspection matters. Known variants include a golden band around the perimeter, pearlized dots as minute markers, and a grooved or textured field, meaning two examples from the same production run can look noticeably different from each other. Finding one with the original dial in clean condition, without amateur polishing or refinishing, is the real benchmark here.
From the Catalog
Hamilton listed the A-650 at $69.50 in 1961, describing it as a rolled gold plate case with embossed numerals and markers and luminous dots, with weatherproof construction, sold with a bracelet included at that price.
Hamilton Catalog Images
1961
1963
What to Look For
| Dial | Look closely at the embossed numerals and markers. They should be crisp, not flattened or worn smooth. The two-tone finish and textured field can mask damage at a glance, so check under good light for chips, discoloration, or signs that the dial has been touched up. The luminous dots at the minute markers can yellow or shrink with age, which is normal, but missing or replaced lume is worth factoring into value. |
| Crystal | These typically came with acrylic crystals. Light surface scratching is expected and can be polished out, but look for deep gouges or crazing that would require replacement. A poorly fitted replacement crystal is also a sign the watch has been opened without much care. |
| Movement | The 689A is an automatic that should keep itself wound from normal wrist motion. Any watch of this age can have dried lubricants, and even a small amount of friction buildup can cause the movement to run erratically or stop entirely. If the seller can show the watch running steadily for several hours on the wrist, that's a good sign, but a service is still worth budgeting for. |
| Case | The 10K yellow rolled gold plate case will show wear over time, particularly on the lugs and case flanks where the plating is thinnest. Honest wear is acceptable, but look for spots where the stainless beneath is showing through heavily. Over-polishing is a common issue and can soften the case edges and lug profile in ways that can't be undone. |
| Crown | Check that the crown threads smoothly and sets the hands without slipping. A worn or replaced crown is not a dealbreaker, but it should be the correct size and finish for the case. A mismatched crown is a clue about the watch's service history. |
The Movement
The caliber 689A is a 17-jewel automatic movement built for Hamilton's domestic market during the early 1960s. It winds continuously from the motion of the wearer's wrist through a bidirectional rotor, with no need for hand-winding during normal use. It's a reliable movement when properly serviced, but like all automatics of its era, it benefits from fresh lubrication to run at its best.