Serviced August 2025, good dial with patina, spidering, and radium burns. Hand polished stainless steel case and screw down case back, Swiss made micro rotor automatic movement, stainless steel expansion bracelet, acrylic crystal, alloy mainspring.
Hamilton began producing the Thin-o-Matic line of watches in 1959 using Swiss made micro rotor movements. These movements allowed Hamilton to produce high quality automatic watches as well as capitalize on the prevailing trend of thin watch cases. This Thin-o-Matic T-501 was one of the first models in the lineup and was made through 1961, with the black dialed version being introduced in 1960. The watch comes with a Swiss (Buren) made micro rotor automatic movement, caliber 666 with 17 jewels and a center sweep second hand. The black dial is in good condition and is showing spidering and radium burns in the finish, especially near the center post. The painted Hamilton and automatic branding are in excellent condition, as is the pearled minute track. The hands appear to be original with patina. The dial and hands were relumed during the August 2025 service. The stainless steel case and screw down case back have been hand polished. The case and case back have some fine scratching. The watch comes ready to wear on a stainless steel expansion bracelet. The 666 automatic movement was serviced August 2025 and is running well and currently performing at +/- 14 seconds per day.
Size:
33.5mm width (excluding the crown)
10.1mm Tall
18mm Lug to Lug
39.3mm Tip to Tip
Case - Hand polished stainless steel case. Screw down stainless steel case back. Fine scratching on case and case back.
Lugs - In excellent condition with some fine scratching.
Crystal - Domed acrylic crystal, polished clean and clear of major defects during service August 2025.
Hands - Original, with patina. Relumed during service.
Dial - Original black dial with embossed numerals and markers. Pearlized minute track. Spidering and radium burns in the finish, most notable near the center post. Paint on the dial is in mint condition. Relumed during service.
Bracelet - Stainless steel expansion bracelet. Comfortably fits up to a 7.75 inch wrist
Movement - Swiss (Buren) made Hamilton caliber 666, micro rotor automatic wind, 17 jewels, center sweep seconds. Fully serviced August 2025. Runs strong and keeping excellent time.
