Rotomatic II
1957–1959 · 10k Yellow Gold Filled / Stainless Steel · Automatic
About the Rotomatic II
Made from 1957 through 1959, the Rotomatic II runs on Hamilton's caliber 665, a 23-jewel automatic that was among the more refined movements Hamilton was producing in that period. The case is 10K yellow Gold Filled with a stainless steel back, 12mm thick, and fitted with applied solid 14K gold markers on a silver dial with a pearled minute track. The Rotomatic II sits in the broader Accumatic family of Hamilton automatics from the late 1950s, sharing that lineage's emphasis on clean, dressy proportions.
Finding one in good shape means checking that pearled minute track carefully. The individual pearl markers are small and can be missing or damaged without being immediately obvious, and a complete, undamaged track makes a real difference to the overall look. The original retail price of $100 in 1957 put this firmly in Hamilton's mid-range, and the 14K gold markers were a genuine selling point that holds up well when the dial has been kept out of moisture and UV exposure.
From the Catalog
Hamilton's 1957 catalog described the Rotomatic II with 23 jewels, 14K gold markers and a pearled minute track, and called out the Silhouette hands with luminous undersides as a feature. It listed as waterproof and retailed at $100, which positioned it as a serious dress automatic without reaching into Hamilton's top price tier.
Hamilton Catalog Images
1957
1958
1959
What to Look For
| Dial | Examine the pearled minute track closely under good light. Individual pearl markers can go missing or sit at odd angles after decades, and a fully intact track is harder to find than it looks in photos. Also check around the applied 14K gold markers for any separation at the edges or discoloration underneath. |
| Crystal | These originally wore a domed acrylic crystal. Acrylic scratches easily but can be polished out. A flat replacement crystal changes the profile noticeably, so confirm the dome is correct for the case. |
| Movement | Oil dries out in the caliber 665 over decades, and a movement running on spent lubricants is doing quiet damage to itself every time the rotor winds the mainspring. Ask about service history before assuming a watch that runs is a watch that's healthy. |
| Case | The 10K gold-filled top with stainless steel back is a common Hamilton pairing from this era. Check the case edges and lugs for wear-through to the base metal, which shows as a darker or brassy tone. Light wear is expected; wear-through at the lugs affects both look and value. |
| Crown | Check that the crown screws down or seats properly and that the stem isn't bent or loose. The original waterproof rating on these no longer applies to the aging gaskets, so a crown that doesn't seat well is a meaningful concern for the movement inside. |
The Movement
The caliber 665 is a Hamilton-made 23-jewel automatic, winding via a bidirectional rotor. The higher jewel count reflects the quality tier Hamilton positioned this watch in during the late 1950s. It's a capable movement when properly serviced, with a smooth sweep seconds hand that gives the dial a clean, uncluttered character.