Sea Beach II
1965–1967 · Stainless Steel · Manual Wind
About the Sea Beach II
Made from 1965 through 1967, the Sea Beach II pairs Hamilton's caliber 686 manual wind with a stainless steel case and a clean white dial marked with embossed silver baton and line indices. The Sea Beach family sits within Hamilton's broader push in the mid-1960s toward sportier, water-resistant dress watches, and the II was the model carrying that identity during this particular window. With straight lugs and a round case, it reads as straightforward and uncluttered, which is part of its appeal.
Embossed silver markers are more vulnerable than they might appear. On examples that have been stored with moisture exposure or worn without care for the seals, the embossed detail can flatten or tarnish unevenly, so look closely at the indices before assuming the dial is in good shape. Luminous dauphine hands are correct for this model, and finding a pair that hasn't discolored badly or been swapped out is a meaningful part of what separates a solid example from a merely passable one.
From the Catalog
Hamilton described the 1965 Sea Beach II with a stainless steel case and a white dial with baton markers at 12, 3, 6, and 9 and line markers elsewhere, priced at $49.95. It was listed as weatherproof and shock-resistant, reflecting Hamilton's intent to position it as a practical daily wear watch.
Hamilton Catalog Images
1965
1966
What to Look For
| Dial | Examine the embossed silver markers at 12, 3, 6, and 9 and the line markers elsewhere under good light. Embossed detail can flatten or lose its crispness with age, and this dial is difficult to refinish correctly, so original condition matters more here than on a printed dial. Look for discoloration, moisture damage, or any sign that the dial has been touched up. |
| Crystal | Check for chips, crazing, or a replacement that doesn't sit flush with the bezel. A properly fitted crystal is part of the weatherproof integrity of this case, and a poorly fitting replacement compromises that entirely. |
| Movement | Ask when the caliber 686 was last serviced. Dried oil in a movement this old builds enough friction to cause the watch to run slow, stop unexpectedly, or refuse to start altogether. This one should be serviced before regular wear if it hasn't been recently. |
| Case | Stainless steel holds up well, but inspect the lug edges and case flanks for polishing that has softened the original lines. The case back can be tricky to open without the right tools, so watch for evidence of prying damage around the back edge. |
| Crown | The crown should thread or seat cleanly and wind the movement with smooth resistance. A worn or replaced crown affects both function and the water-resistant rating. Even if the seals are intact, vintage watches of this age should not be submerged regardless of original rating. |
The Movement
The caliber 686 is a 17-jewel manual wind movement made during Hamilton's American production era. It winds from the crown and drives a sweep seconds hand, giving the dial a cleaner look than a subseconds register would allow. The 686 is reliable when properly lubricated, but reassembly requires patience, particularly when aligning the train bridge, which is worth knowing if a service is in the watch's near future.