I think I seen some thread about some watchmaker service the sa3135 and he even praise sa3135 keyless work is neat. From what I seen, the keyless work looks decent but I think I just misplace some gears near the stem to the hands. Some bit of guidance will help me restore this movement.
Despite so much negative and lack of spares, in my experience. This sa3135 is very robust and accurate. I have another rolex franken running on sa3135. Always keeping COSC time for the 2 years I owe them.
The best time about using Yuki3135 or sa3135 is they accept gen dial so that I do not need to chop off the feet of an expensive gen rolex dial and they hand set in the same direction like gen. Meaning a franken is difficult to call out as rep even throw to a expert to hand in hand examine. He needs to open the backcase in order to call out your franken.