Hamilton Automatic Micro Rotor Movement. Balance Ticks Normally When Slight Pressure Is Being Held On Second Hand. Thank you for looking! The item “Hamilton Automatic Micro Rotor Movement, cal. 666, For Repair” is in sale since Wednesday, October 04, 2017. This item is in the category “Jewelry & Watches\Watches, Parts & Accessories\Parts, Tools & Guides\Parts\Movements”….