Dateline TM-4900
1968–1971 · 10k Yellow Gold Filled · Automatic
About the Dateline TM-4900
Made from 1968 through 1971, the Dateline TM-4900 is part of Hamilton's Dateline family, a line built around the convenience of automatic winding with date display. This model runs on the caliber 629, a 17-jewel automatic, and comes in a 10K yellow Gold Filled round case with a silver dial and applied gold markers but no numeric hour indices. The clean, uncluttered dial gives it a restrained, modern feel that fits comfortably with the late-1960s design sensibility Hamilton was working in.
Applied gold markers on a silver dial hold up reasonably well over time, but check closely for separation, detachment, or missing markers, which are difficult to source and expensive to replace properly. The 10K Gold Filled case can show brassing at wear points, so condition of the case surface matters more than it might on a stainless example. When you find a clean one, the combination of the all-marker dial and sweep seconds makes for a very legible, polished dress watch.
From the Catalog
Hamilton listed the Dateline TM-4900 at $185 in 1968, positioning it as a mid-tier automatic dress watch in the Dateline lineup for that year.
Hamilton Catalog Images
1965
1968
1971
What to Look For
| Dial | Look closely at each applied gold marker under good light. Markers can pull away from the dial surface or go missing entirely, and replacements are hard to match. Also check for spotting or discoloration in the silver finish, which is common with age. |
| Crystal | Check for deep scratches or crazing in the crystal. A replacement is straightforward, but the current crystal condition gives you a sense of how the watch has been stored and handled. |
| Movement | Ask about service history. The caliber 629 is a reliable automatic, but dried lubricants in a movement this age create enough friction to stop it or degrade timekeeping noticeably. A recently serviced example will run more consistently and protect the movement long-term. |
| Case | This is a 10K yellow gold-filled case, which means the gold layer can wear through at high-contact points like the lugs and case back edges. Inspect those areas for brassing or exposed base metal. Light surface wear is expected; heavy wear through is harder to ignore. |
| Crown | The crown takes regular wear and is often the first thing to show damage or replacement on a vintage automatic. Check that it threads or pushes in smoothly and that the stem engages without wobble. Also note that this watch was originally rated waterproof, but vintage water resistance ratings should not be trusted without fresh seals and a pressure test. |
The Movement
The caliber 629 is a 17-jewel automatic movement that Hamilton used across several dress models in this era. It winds via a rotor as the watch moves on the wrist, so no manual winding is needed in daily wear. It is a capable, uncomplicated movement with no date complication to worry about, which actually makes it one of the more straightforward Hamilton automatics to service and keep running well.