Dateline TM-5904
1971โ1973 ยท Stainless Steel Day
About the Dateline TM-5904
Made from 1971 through 1973, the Dateline TM-5904 is a round stainless steel automatic from Hamilton's Dateline family, powered by the caliber 629 with 17 jewels. The Dateline line was Hamilton's domestic automatic-with-date offering through the early 1970s, and the TM-5904 fits that range with a clean silver dial, applied silver markers, and a date display at 3 o'clock. Hidden lugs give the case a sleeker, more integrated profile than the lug styles common on earlier Hamiltons.
Finding one in good shape means scrutinizing the dial closely, as applied markers can come loose or develop tarnish at their edges, and silver dials from this era are prone to spotting if moisture ever got inside. The hidden lug design can also make finding a correct-fitting replacement bracelet or strap more involved, so check that the case ends are undamaged.
From the Catalog
Hamilton marketed this watch as shock-resistant, anti-magnetic, and weatherproof, with an original retail price of $89.50. It's worth keeping in mind that "weatherproof" meant something specific to 1970s standards, vintage watches of this type are not suitable for water exposure today, regardless of their original rating.
Hamilton Catalog Images
1971
1972
1973
What to Look For
| Dial | Look carefully at the applied silver markers. They can pull away slightly at the edges or develop oxidation underneath, which shows as dark shadowing around the base of each marker. Also scan the silver dial surface for spotting or blotchiness, which usually points to past moisture intrusion. |
| Crystal | Check for deep scratches or a hazy appearance, which can affect legibility more than people expect on a silver dial. Replacement crystals for round cases this size are generally available, but confirm the fit before committing. |
| Movement | Ask about service history. The cannon pinion in the 629 is small and prone to loosening over time, which can cause the hands to slip or stop advancing correctly. A watch that hasn't been serviced in years may also suffer from dried lubricants creating enough friction to degrade timekeeping or stop the movement entirely. |
| Case | The hidden lug design is attractive but check the case edges and lug openings for dings or deformation, these areas can take damage that's hard to spot at a glance. Also be aware that case backs on watches like this can be stubborn to open, so make sure any seller can confirm the movement has been accessed and inspected. |
| Crown | Test the crown through all its positions. On a date-equipped automatic, it should wind smoothly, set the date cleanly, and set the hands without slipping. Any grinding or skipping is worth investigating before purchase. |
The Movement
The caliber 629 is a 17-jewel automatic movement that winds bidirectionally through a rotor, so normal wear keeps it running without any manual winding required. It's a reliable workhorse from this period but not immune to the passage of time, dried lubricants are a common issue in movements this age, and the cannon pinion is small and prone to loosening, which can cause the hands to slip or the watch to run slow. A recently serviced example will behave noticeably better than one that hasn't been opened in decades.