I recently serviced this beautiful 1974 Omega Geneve reference 166.0163 calibre 1012 for a ClockSavant customer. It is a highly sentimental family watch inherited from his father. This iconic watch was launched during the quartz crisis as Omega worked to compete and release their own quartz watch (the superb 1310) while maintaining the soul of the company and its mechanical movements. The calibre 1012 movement reflects Omega's continual refinement and persistence in the face of adversity. The overall presentation, size, and feel of the watch is fantastic. The extensive dirt you see is due to a breakdown of the seals over time. The 1012 has unique attributes including an unusual "wig wag" pinion used to wind the mainspring. Located on the barrel bridge, it travels through an oblong hole and an extended pivot-like section of screw used to hold it down extends onto the mainplate where a spring maintains the wig-wag pressure. It has a unique integrated dial-side center wheel with cannon pinion which must be disassembled/cleaned/lubricated. Removing the cannon pinion from the wheel requires significant care and tension must be spot-on. Some guidance indicates it should not be diassembled; however, today almost 50 years later we have no choice. It also has a unique drive pinion on the third wheel. The movement is slightly larger in diameter allowing for a highly modular automatic mechanism which fits flat onto the mainplate (somewhat like a puzzle piece) rather than stacked as is commonly seen. Overall, it is an interesting and well made movement. After servicing, the watch is running at near COSC accuracy with exceptional health and strength.