Thinline 2026B
1968–1970 · 14K yellow · Manual Wind
About the Thinline 2026B
The Thinline 2026B was made from 1968 through 1970 in a 14K yellow gold oval case, running on Hamilton's manual-wind caliber 680. It belongs to the Thinline family, Hamilton's line of slim, dress-oriented watches that leaned into refined simplicity over ornament. The white circular dial carries applied gold markers with gold dot indices, keeping things clean and legible without unnecessary fuss.
Hidden lugs are worth paying attention to on this model, they give the case a sleek, integrated look, but they also mean the bracelet or strap attachment points are less obvious at a glance, so confirming lug integrity takes a closer look than usual. Solid gold cases from this era wear well but do show their age, so checking for deep scratches or significant thinning from past polishing is worthwhile before committing to a piece.
From the Catalog
Hamilton listed this watch at $150 in 1968, positioning it squarely in the brand's dress watch range for buyers who wanted solid gold construction without a complicated movement underneath.
Hamilton Catalog Images
1966
1968
1971
What to Look For
| Dial | Look for even color across the white dial with no staining, discoloration, or moisture damage. Check that the applied gold markers are all present and sitting flat, any that are lifted or missing will affect both the look and the value. |
| Crystal | Inspect the crystal for deep scratches or chips. A worn crystal is replaceable, but confirm it's seating properly with no gaps around the edge. |
| Movement | Wind the watch and set it aside to run. Dried lubricants can build up enough friction to stop a movement outright, so a watch that starts but stalls within the hour is telling you it needs a service. |
| Case | This is a solid 14K yellow gold case, so examine it for deep gouges or signs of aggressive polishing that may have softened the original lines. The hidden lug design is part of the watch's appeal, so check those areas specifically for any cracks or wear. |
| Crown | Work the crown through winding and setting. It should feel smooth and positive in both positions, with no slipping during winding or looseness at rest. |
The Movement
The caliber 680 is a 17-jewel manual-wind movement that Hamilton used across a range of its dress watches in this period. It's a straightforward, reliable caliber, nothing exotic, but well-suited to a slim case and daily wear. On a watch that hasn't been serviced recently, expect it to need fresh oil and a thorough cleaning before it runs at its best.