Reactor Quark 66101 Two-Tone Watch
Updated September 15, 2026
| Lot number | 153 |
| Auction | Vintage watches Omega,Bulova,Hamilton and more |
| Date | September 30, 2026 at 5:00 PM CDT |
| Auction house | Sphere Auctions LLC |
| Location | Sun Prairie, Wisconsin |
This is a Reactor Quark-66101 two-tone stainless steel watch with a gray dial, orange-accented hour markers, an applied "12," and the Reactor radiation-symbol logo. It has a day/date window, a screw-down crown stamped with the Reactor radiation logo, and a fold-over clasp marked "Reactor" with the same radiation-symbol logo. The case back is stamped "All Stainless Steel, Japan Movement, 200 Meters Water Resistant, Reactor, Quark-66101." The case measures approximately 37mm (37.01mm measured by caliper). A new battery has been installed. This watch is running as of the time of listing with a new battery. Extended runtime and accuracy are not guaranteed.
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