M 89-4
1964 · Stainless · Automatic
About the M 89-4
Made in 1964, the M 89-4 is part of Hamilton's M Series lineup and runs on the caliber 689, a 17-jewel automatic movement. The stainless steel case is round with swept lugs, and the silver dial uses applied baton markers with a sweep seconds hand. It was sold as a complete package with a stainless steel bracelet, priced at $89.50 when it first appeared in 1964. The M Series occupies the more utilitarian end of Hamilton's catalog from this era, offering solid automatic performance in clean, understated cases.
Applied baton markers hold up well over time, but the dial itself is worth a close look. The lacquer on silver dials from this period is fragile, and any previous attempt to clean the dial can leave the printing compromised or the finish uneven. A white dial variant also exists, so it's not unusual to encounter examples that differ from the original silver configuration.
From the Catalog
Hamilton listed the M 89-4 as a self-winding stainless steel watch with a matching stainless bracelet, rated waterproof and shock resistant. It retailed for $89.50 in 1964.
Hamilton Catalog Images
1964
What to Look For
| Dial | Check the silver dial carefully for separation of the markers, discoloration, or uneven finish around the markers. The lacquer on dials of this age cannot be cleaned without risking the printed elements underneath, so any past cleaning attempt may show as streaking or dull patches. Confirm whether the applied baton markers are all present and seated flat. |
| Crystal | Look for deep scratches or crazing in the crystal. Replacements are available, but confirm the fit is correct and the crystal sits flush with no gaps at the bezel edge. |
| Movement | The caliber 689 is an automatic, but oil dries and hardens in movements of this age. That friction buildup can prevent the rotor from winding the mainspring effectively, and a watch that runs fine when manually agitated but won't sustain power on the wrist is a common symptom. A service is almost always needed on examples that have been sitting. |
| Case | The stainless steel case should show honest wear rather than deep gouges or polishing that has softened the original lines. Check the case back for signs of forced opening, which can leave marks or damage the threads. |
| Crown | Test the crown through winding and time-setting. A crown that slips, feels loose, or won't engage the setting position cleanly may indicate a worn stem or damaged threads in the tube. On single-piece cases, the stem is a two-piece design, and it can break during movement removal if not handled carefully, so crown and stem condition matters before any service. |
The Movement
The caliber 689 is a 17-jewel automatic movement made by Hamilton. It winds through a bidirectional rotor, so normal wear keeps the mainspring charged without manual winding. It's a reliable workhorse caliber from this period, not especially complex, but well-suited to daily use and straightforward to service when parts are available.