Sea Rover III
1968–1970 · Stainless Steel · Manual Wind
About the Sea Rover III
Made from 1968 through 1970, the Sea Rover III is part of Hamilton's Sea Rover sport line, a family of stainless steel casual watches aimed at active wear. It runs the caliber 688, a 17-jewel manual wind, housed in a 37mm round stainless steel case with a sweep seconds hand. The white dial carries raised gold numerals at 3, 6, 9, and 12, with raised gold markers filling the remaining positions.
Finding one with an honest dial is the real challenge here. The raised gold numerals and markers on these can show wear or separation from the surface if the watch spent time in rough conditions, so close inspection matters. The maroon and blue dial variant referenced in Hamilton's catalog gives these a sporty character that reads differently than a standard white dial, and confirming which variant you have is worth doing before purchase.
From the Catalog
Hamilton offered the Sea Rover III in stainless steel with a maroon and blue dial, priced at $75.00 on strap or $82.50 on bracelet in their 1972 catalog, reflecting the watch's positioning as a durable everyday sport piece.
Hamilton Catalog Images
1968
What to Look For
| Dial | Inspect the raised gold numerals and markers carefully. Look for any that are separating, shifted, or missing entirely. Check for moisture damage or staining on the white dial surface, which can appear as discoloration near the edges or under the crystal. |
| Crystal | Check for deep scratches or chips. A heavily scratched crystal is replaceable, but confirm no moisture has gotten underneath and left marks on the dial. |
| Movement | Ask when the caliber 688 was last serviced. In a movement this old, dried oil builds enough friction to cause a manual wind to run erratically or stop altogether. A watch that winds smoothly and runs well at purchase may not stay that way without fresh lubrication. |
| Case | Look at the lugs for wear and the case back for evidence of prior openings. The 37mm stainless case holds up well, but check that any engravings or personalization are acceptable to you. Despite original water-resistance claims, this watch should not be treated as water-safe today. |
| Crown | Pull the crown gently and do not force it. On movements of this generation, the crown can detach from the stem if pulled with too much force. Test that it winds smoothly and sets the hands without slipping. |
The Movement
The caliber 688 is a 17-jewel manual wind movement produced by Hamilton during this period. It winds from the crown, requires regular hand-winding to keep running, and drives a sweep seconds hand. It is a straightforward, serviceable caliber, though like any movement now well over fifty years old, it benefits significantly from fresh lubrication and a proper cleaning.