Thinline 2046B
1971 · 14k Solid Yellow Gold
About the Thinline 2046B
Made only in 1971, the Thinline 2046B is a 14k solid yellow gold dress watch powered by Hamilton's caliber 680. The Thinline family was Hamilton's answer to the growing demand for slimmer, more elegant watches in the late 1960s and early 1970s, and the 2046B fits comfortably within that lineup as a refined round-cased option. The hidden lug construction gives the case a clean, uninterrupted profile that suits the dress-watch intent of the whole series.
Solid 14k gold cases mean any example you find has real material value, but that also means previous owners may have had the case polished over the years. Look closely at the lug edges and case flanks for signs of over-polishing, which rounds out the crispness that makes a well-preserved gold case so appealing. Because this model appeared in only one catalog year, finding one in honest, unpolished condition takes some patience.
Hamilton Catalog Images
1971
What to Look For
| Dial | Inspect the dial carefully under good light. Look for spotting, discoloration, or separation near the edges, which can signal moisture intrusion at some point in the watch's life. Any refinishing will usually show itself as overly uniform color or blurred printing at the numerals. |
| Crystal | Check for deep scratches or crazing in the crystal. A fogged or crazed crystal can sometimes hint at moisture getting inside, so if the crystal looks compromised, give the dial extra scrutiny. |
| Movement | The caliber 680 is a manual wind movement, and dried oil in a watch that has been sitting unworn is a genuine concern. Friction from dried lubricants can be enough to stop the watch entirely. Confirm it is running and holding time before assuming it is service-ready. |
| Case | Solid 14k gold is soft enough to show wear, so examine the case for dents, deep dings, or evidence of heavy polishing that has softened the original lines. The hidden lug design is part of what makes this case attractive, and that detail suffers most when the watch has been aggressively polished. |
| Crown | Test the crown through its positions. It should wind smoothly and set the hands without slipping or grinding. A worn or replaced crown on a solid gold case can be a minor hassle to match correctly, so confirm the existing one is original and functional. |
The Movement
The caliber 680 is a manual wind movement from Hamilton's American production era, running at 18,000 beats per hour. It is a straightforward, reliable caliber that responds well to a proper service, though its age means most examples on the market today are overdue for fresh oil and a timing adjustment. Jewel count for this specific reference was not recorded in available documentation, so that detail is omitted here.