Halesworth B
1956–1957 · 10k Yellow Gold Filled · Manual Wind
About the Halesworth B
Made from 1956 through 1957, the Halesworth B was part of Hamilton's Medallion family, a line of dress watches positioned at the finer end of Hamilton's domestic catalog. The case is 10K yellow Gold Filled with a rectangular profile and hidden lugs, giving it a clean, tailored look that suited the era's taste for slim, refined wristwatches. Inside is the caliber 770, a 22-jewel manual wind movement. The dial is butler finished sterling silver with applied 14K gold markers and dots, a genuinely precious combination for a Gold Filled case watch.
Surviving examples often show the kind of gentle patina you'd expect from a late-1950s dress watch that spent decades in a jewelry box rather than on a wrist. The dial is the thing to focus on here: that butler finished silver dial surface is distinctive, and the 14K gold markers add real material value beyond what the case price would suggest. The related Halesworth shares the same basic design language, so knowing the difference comes down to reading the dial carefully.
From the Catalog
Hamilton described the Halesworth B with straightforward pride in its materials: a 10K yellow gold-filled case paired with 14K gold markers and dots on a sterling silver dial. In 1957, it retailed for $95 with a bracelet or $85 on a strap, putting it firmly in the upper tier of Hamilton's dress watch pricing for that year.
Hamilton Catalog Images
1957
What to Look For
| Dial | The butler finished silver dial surface is prone to spotting or oxidation over time. Look for displaced or shifted applied gold markers and dots, any that have moved or are beginning to separate from the dial are a warning sign. The finish should have a soft, matte satin quality; a polished or refinished dial looks noticeably different and affects collector value. |
| Crystal | The rectangular crystal should be examined for chips along the edges and deep scratches across the surface. Replacements are available but getting the right fit for a rectangular case takes attention, confirm the crystal sits flush with no gaps. |
| Movement | Ask about service history. Dried oil in the caliber 770 creates enough friction to stop the movement, so a watch that runs well today may not run tomorrow without a fresh service. Also note that the movement ring is prone to verdigris, a greenish corrosion that can appear around the brass ring if moisture has ever gotten inside, worth checking if the caseback has been opened. |
| Case | Gold-filled cases from this era wear through at high-contact points over time, especially on the lugs and caseback edges. Check those areas under good light. The hidden lug design looks sharp but gives you less metal to work with if a lug cracks or chips. The caseback on this style can be tricky to open without the right tool, so any pry marks are a red flag. |
| Crown | Confirm the crown pulls out smoothly through its positions and that the stem engages cleanly. A loose or wobbly crown can mean a worn stem or a replacement that doesn't quite fit. Original crowns on dress watches from this period are often unmarked gold-filled, so mismatched finish or size is easy to spot. |
The Movement
The caliber 770 is a 22-jewel manual wind movement made by Hamilton in the United States. It was one of the more refined movements in Hamilton's domestic lineup during the 1950s, with the higher jewel count providing additional protection against wear at key friction points. It winds with a satisfying feel and keeps time reliably when properly serviced, though like any movement of this age, fresh oil and a clean service make a real difference in how it performs.