Dateline T-280
1966–1967 · 14k Solid Yellow Gold · Automatic
About the Dateline T-280
Made from 1966 through 1967, the Dateline T-280 is part of Hamilton's Dateline family, which combined automatic movements with date displays at a time when that pairing was becoming increasingly expected in the dress watch segment. The T-280 runs on the caliber 621, a 17-jewel automatic, and comes in a 14K yellow gold case with a silver dial carrying applied gold numerals and bar markers, with the date window at 3 o'clock. Numbers appear at 6, 9, and 12, with bar markers filling the remaining positions, giving the dial a clean, organized look that suited the mid-1960s taste for restrained elegance. The Dateline family is covered in depth in the dedicated family guide, but the T-280 represents the gold-cased end of that lineup.
Surviving examples in 14K yellow gold tend to show their age honestly, with case wear concentrated on the lugs and caseback edges where Gold Filled and solid gold cases alike get handled most. The applied markers and numerals are worth examining carefully, since any that have shifted, separated from the dial, or gone missing change both the look and the value of the dial considerably. Finding a clean example with all markers intact and a dial that hasn't faded or been refinished is genuinely satisfying.
From the Catalog
Hamilton's 1966 catalog listed the T-280 in 14K yellow and white gold at $175, describing it with a silver dial, applied bar markers, and a date window at 3 o'clock. That price put it firmly in the upper tier of Hamilton's automatic lineup for the year.
Hamilton Catalog Images
1966
What to Look For
| Dial | Check that all applied gold bar markers and numerals are present, flat, and properly seated. Any that have separated, tilted, or gone missing are difficult to replace correctly. Look for refinishing signs: a dial that looks too perfect, has an uneven texture, or shows inconsistent luster around the markers has likely been redone. |
| Crystal | Examine the crystal for deep scratches or chips at the edges. Replacement crystals are available, but confirm the fit is flush and that the crystal hasn't been shimmed or improperly seated. |
| Movement | The caliber 621 is an automatic and should keep itself wound through normal wear, but dried lubricants are common on any movement this age and can generate enough friction to stop it entirely. If the watch stops frequently, runs poorly, or the sweep seconds hand moves in steps rather than smoothly, a service is due. The oscillating weight on this caliber can develop a tendency to work loose on its axle or contact the caseback, both of which show up as irregular winding behavior or an unusual sound from the movement. |
| Case | This is a solid 14K yellow gold case, so wear is real metal loss, not plating. Inspect the lugs for thinning, which is common after decades of strap changes, and check the caseback for evidence of prying attempts. The casebacks on these can be stubborn to open, and amateur attempts often leave marks. |
| Crown | The crown should pull out to the date-set and time-set positions without slipping and push back in with a firm, positive feel. A crown that spins freely or feels loose in the stem may need attention before the watch can be properly worn. |
The Movement
The caliber 621 is a 17-jewel automatic movement from Hamilton's Swiss production era, designed to self-wind through the motion of the wearer's wrist via a rotating oscillating weight. It includes a date complication driven off the gear train, with the date advancing at midnight. The 621 is a generally reliable movement when serviced, though it benefits from careful attention to the oscillating weight, which has a known tendency to loosen on its axle over time.