Dateline A-677
1965–1969 · 10k Rolled Gold Plate / Stainless Steel · Automatic
About the Dateline A-677
Made from 1965 through 1969, the Dateline A-677 is part of Hamilton's Dateline family of date-display automatics, sharing its platform with several related models including the Thin-o-matic line. It runs on the caliber 694A, a 17-jewel automatic movement, and comes in a round 10K yellow RGP case with a stainless steel back. The white dial carries applied gold markers and a date window, with a sweep seconds hand giving the dial a clean, uncluttered read.
Applied gold markers on a white dial are a combination that shows age honestly, so look closely at the dial surface before buying. Discoloration, spotting near the date window, and markers with separation or missing sections are all common on examples that haven't been stored carefully, and any of those details will affect value more than case condition on a watch like this.
From the Catalog
Hamilton marketed the A-677 as a calendar watch and offered it in both bracelet and strap configurations, priced at $89.50 on bracelet and $79.50 on strap in 1965. By 1968, the strap version had settled to $69.50.
Hamilton Catalog Images
1968
1971
What to Look For
| Dial | Check the applied gold markers carefully. Any that are detached, tilted, or missing will be difficult to correct without a full dial restoration. Also look at the area around the date window for bubbling or staining, which is common when moisture has gotten inside the case. |
| Crystal | The crystal profile on these round Dateline models can be specific to the case, and correct replacements are not always easy to source. Confirm the crystal is intact, properly seated, and free of deep scratches before purchasing. |
| Movement | The 694A is an automatic, so it should wind from wrist movement. On any movement this age, decades of dried lubricants create friction throughout the gear train, and the date mechanism adds its own set of small spring-loaded parts that are easy to lose during service. Ask whether the watch has been recently serviced. |
| Case | This is a 10K RGP case, meaning a gold-filled layer over a base metal core. Check the high-contact points on the lugs and case sides for wear-through to the base metal underneath. Some surface wear is expected, but deep wear-through is difficult to reverse. |
| Crown | Test the crown in both the winding and date-setting positions. It should turn smoothly and click between positions without slipping. A crown that spins freely without engaging the movement usually means a worn or broken stem, which is a straightforward but necessary repair. |
The Movement
The caliber 694A is a 17-jewel automatic movement that winds from wrist motion through a bidirectional rotor. It also incorporates the date complication, advancing the date display at midnight via a separate mechanism driven off the main gear train. It's a competent, service-friendly movement when properly lubricated, but like any automatic pushing four or more decades, it benefits from a fresh service before daily wear.