Lyle B
1956–1957 · 14k Solid Yellow Gold · Manual Wind
About the Lyle B
The Lyle B appeared in a single catalog year, 1957, making it one of the more focused entries in Hamilton's Masterpiece family. It runs on the caliber 770, a 22-jewel manual wind movement, and is cased in 14K yellow gold with a square profile. The dial is silver with applied 14K gold numerals and markers positioned at 2, 4, 8, 10, and 12, plus a subseconds register at 6 o'clock. The Lyle B was a close sibling to the standard Lyle, sharing the same basic architecture with subtle distinctions between the two variants.
Finding a Lyle B in good shape means paying close attention to that silver dial, which can develop oxidation or spotting over decades if moisture ever reached it. The applied 14K gold numerals and markers are worth inspecting closely for any that have separated from the dial or shifted position, since replacement parts for this specific dial configuration are not easy to source. At $125 new in 1957, this was a genuine fine jewelry watch in Hamilton's lineup, and the ones that survived with honest, unpolished cases and intact dials are the ones worth chasing.
From the Catalog
Hamilton's 1957 catalog described the Lyle B as a 22-jewel watch in a 14K yellow gold case, with 14K gold numerals and markers on a sterling silver dial, offered on a strap at $125.
Hamilton Catalog Images
1957
What to Look For
| Dial | Inspect the silver dial carefully for oxidation, spotting, or discoloration, especially around the edges and near the subseconds register. Check each applied gold numeral and marker to confirm none have separated from the dial, shifted position, or gone missing. These dials are not reproducible in any meaningful way, so condition here matters more than almost anywhere else. |
| Crystal | Confirm the crystal fits flush and is free of deep scratches or crazing. A ill-fitting crystal on a square case like this can allow moisture to reach that silver dial, which accelerates oxidation quickly. |
| Movement | Ask about service history. Lubricants in the caliber 770 break down over decades, and dried oil creates enough friction to stop the movement entirely or cause it to run erratically. A watch that runs well on the wrist is a good sign, but it does not substitute for a proper service. |
| Case | Look at the case under good light for signs of over-polishing, which will round off the edges and corners of the square profile. On a 14K yellow gold case this age, sharp lines are a strong indicator of careful ownership. Check that the case back opens correctly, as these can be stubborn and are sometimes forced in ways that damage the lip. |
| Crown | Confirm the crown threads smoothly, seats fully, and that the stem engages the movement cleanly in both the winding and hand-setting positions. A crown that feels loose or spins without resistance often indicates a worn or replaced stem. |
The Movement
The caliber 770 is a 22-jewel manual wind movement built on Hamilton's robust 12/0-size platform. It winds from the crown, keeps time reliably when properly serviced, and drives a subseconds hand from a dedicated gear train. The higher jewel count in the 770 reflects Hamilton's positioning of this movement in its fine watch tier, and it rewards good service with solid, consistent timekeeping.