Darwin
1965–1969 · 10k Rolled Gold Plate / Stainless Steel · Manual Wind
About the Darwin
Made from 1965 through 1969, the Darwin is a cushion-cased manual wind from Hamilton's mid-decade dress watch lineup, running the caliber 681 with 17 jewels. The case came in both 10K white RGP with stainless steel back and 10K yellow RGP with stainless steel back, giving collectors two distinct looks in the same model. The silver dial pairs with applied gold markers and no numerals, keeping the face clean and uncluttered. The Darwin is closely related to the Lord Lancaster K, sharing that same restrained, formal character.
The dial is one of the first things to scrutinize on a Darwin. Applied markers can come loose or develop patina unevenly over time, and because the dial carries no numerals, any disturbance to the markers becomes immediately obvious. The cushion case shape is appealing in a way that reads as distinctly mid-1960s, and finding one with an honest, unpolished case is becoming less common as the years pass.
From the Catalog
Hamilton listed the Darwin in 1965 at $69.50, describing it with a white dial, gold markers, and a rectangular case in 10K yellow RGP with a stainless steel back. By 1968, the marketing copy stayed lean, essentially repeating the case specification and price without elaboration.
Hamilton Catalog Images
1965
1966
1968
What to Look For
| Dial | Look closely at the applied gold markers under good light. Check for any that are separating, tilted, or showing tarnish that differs from the others. The silver dial itself should be consistent in color with no fading, spotting, or moisture damage near the edges. |
| Crystal | Check for deep scratches or chips. A heavily scratched crystal can usually be replaced, but confirm the replacement fits the cushion case correctly before buying. |
| Movement | The caliber 681 is a manual wind and needs regular winding to run. On a movement this age, oil dries out and thickens, and that friction alone can stop the watch even if the mainspring still has life left. Ask whether it has been recently serviced, and listen for smooth, consistent ticking without any hesitation. |
| Case | The Darwin uses a 10K RGP case over a stainless steel back. Examine the lugs for wear-through to the base metal, which shows as a brassy or silver tone where the gold finish has rubbed away. Straight lugs like these show edge wear early, so pay attention to the lug tips and corners. |
| Crown | The original crown should feel snug and engage cleanly at the winding position. A loose or wobbling crown may indicate a worn stem or crown, which affects both function and water resistance. Note that even if the Darwin was originally rated waterproof with seals intact, no vintage watch of this age should be trusted near water. |
The Movement
The caliber 681 is a 17-jewel manual wind movement made during Hamilton's domestic production era. It needs to be wound daily and will run down completely if left unworn. At this age, lubricants have almost certainly dried out, so a full service is the responsible starting point for anyone putting one of these back into regular use.