Thinline 2010
1964 · 14k Solid Yellow Gold · Manual Wind
About the Thinline 2010
Made only in 1964, the Thinline 2010 is part of Hamilton's Thinline family, a group of manually wound dress watches built around slim, elegant proportions. The case is 14K yellow gold with a square profile and hidden lugs, giving it a clean, architectural look that was very much in step with the tailored dress watch aesthetic of the early 1960s. Inside is the caliber 687A, a 17-jewel manual wind movement, and the whole package was priced at $175 when new. The circular silver dial carries applied gold markers and a subseconds register, a refined layout for a watch this understated.
The single production year means examples don't surface often, and when they do, the condition of that silver dial deserves close attention. Applied gold markers on a dress watch dial can loosen over time, and any missing or shifted marker changes the character of the piece considerably. The 14K yellow gold case holds up well to age if it hasn't been over-polished, so look for crisp lug lines rather than the soft, rounded edges that come from too many trips through a polishing wheel.
From the Catalog
Hamilton marketed the Thinline 2010 on the strength of its ultra-thin case design, emphasizing shock resistance, anti-magnetic protection, and an unbreakable mainspring. It retailed for $175 in 1964, placing it firmly in the premium tier of Hamilton's dress watch lineup.
Hamilton Catalog Images
1964
What to Look For
| Dial | Check each applied gold marker carefully. Loose, detached, or repositioned markers are common on dress watches this age and can be difficult to notice at a glance. Also look for any hairline cracks or spotting in the silver finish, which are harder to restore than surface grime. |
| Crystal | The crystal should be flat and clear with no deep scratches or crazing. Replacement crystals for square-dial Thinline models can be tricky to source correctly, so a damaged original is worth factoring into the price. |
| Movement | Ask when the caliber 687A was last serviced. Lubricants in a movement this age dry out completely over time, and dried oil creates enough friction to stop a watch or wear down delicate pivot points. A watch that runs doesn't necessarily mean a watch that runs well. |
| Case | The 14K yellow gold case is softer than steel and shows its history. Look at the lugs and case edges under good light. Heavy polishing rounds off the lines and removes metal that can't be put back. Original sharpness is worth more than a shiny surface. |
| Crown | Test the crown through its full range of motion. It should wind smoothly and set the hands without slipping or grinding. A worn or replaced crown on a gold-cased watch is worth noting, since matching period-correct parts can be hard to find. |
The Movement
The caliber 687A is a 17-jewel manual wind movement from Hamilton's domestic production era, built for reliability in a slim package. It's hand-wound, meaning the wearer sets the rhythm, and it carries Hamilton's standard shock resistance for the period. Like most manually wound movements of this size and age, it rewards regular servicing and responds well when the lubricants are fresh.