Hey I was going back and forth with phong and his son on this topic. There are no cases that will take the 3175 or 85. Phong is now saying that I would have to give him my real 16710 case and back and bezel. He can make a copy in about a month at which point I will get my orig parts back. I would have to buy a min of 6 cases for my first order and I will get those 6 at a discount. We are still looking at $7000. So we would have 6 cases. The yuki and parts to make it a 3185 is someone else said is $1000. Throw in crystal, crown, insert, bracelet dial, hands,date wheel we are looking at $3500 for a watch that can be brought for $6000.
The ETA one do not work. There is no reliability and EVERY one have broke, or all the ones I saw. Good luck.