Dyson
1948–1951 · 14k Yellow Gold Filled · Manual Wind
About the Dyson
Made from 1948 through 1951, the Dyson is a 14K yellow Gold Filled tonneau-cased dress watch powered by Hamilton's caliber 747, a 17-jewel manual-wind movement. The dial specifies applied gold numerals and dot indices, with Arabic numerals at 2, 4, 8, 10, and 12 and a subseconds register at 6 o'clock. It appeared in Hamilton's 1948 catalog at $60.50, which positioned it solidly in the mid-tier of Hamilton's dress line for the era. The Dyson doesn't belong to a named family, but it fits comfortably among Hamilton's post-war tonneau dress pieces that prioritized clean dials and quality finishing over complication.
Two dial variants turn up on surviving examples: a white dial and a white finished sterling silver dial, so it's worth paying close attention to what's actually under the crystal before buying. The applied gold numerals and dot indices are the detail that defines this dial visually, and any loss or re-gluing there affects both authenticity and value. Finding one with original, undisturbed dial finish and a well-preserved Gold Filled case that hasn't been over-polished is the real challenge.
From the Catalog
Hamilton's 1948 catalog described the Dyson simply and precisely: Grade 747, 17 jewels, 14K natural gold-filled case, with an 18K applied gold numeral-dot dial. It retailed for $60.50, reflecting the quality of the applied gold dial work and the solid gold-filled case construction.
Hamilton Catalog Images
1948
1949
1950
1951
What to Look For
| Dial | The white dial finish is prone to peeling or fading if it has ever been exposed to moisture or careless cleaning. Look closely at the applied gold numerals and dot indices for any that appear separated, re-glued, or missing entirely. The subseconds register paint should have clean, crisp markings. |
| Crystal | Check for chips, deep scratches, or a replacement crystal that doesn't fit flush with the case. A poorly fitting crystal can let moisture reach the dial. |
| Movement | Oil dries out on movements that have sat for decades. If the caliber 747 is running inconsistently or stopping, dried lubricants are the most likely cause. A full service should be expected on any unworn example. |
| Case | The 14K yellow gold-filled case can be worn through to base metal at the lugs and case back edges from decades of wear or aggressive polishing. Inspect those areas carefully. Swept lugs are particularly vulnerable to thinning. |
| Crown | Check that the crown threads smoothly and sets the hands without slipping. A worn or replaced crown can affect both function and originality. |
The Movement
The caliber 747 is a 17-jewel manual-wind movement produced by Hamilton in the United States. It's a reliable, straightforward movement of the era, wound and set by hand, with no complications beyond the subseconds. The 747 has a good reputation for accuracy when properly serviced, and parts availability is reasonable compared to some of Hamilton's less common calibers from this period.