Regarding the Russian chronos, I have (2). The Blancpain style Day-Night Chrono, and the Buran. I have worn the Blancpain style for about 6 months daily and and have kept the Buran running for about 4 months. Both watches ran a little slow and were adjusted over a period of a few days and since have kept time within about 5 seconds a day. Both have long running times, about 62 hours but keep better time if wound every day. I would rate the cases as excellent and in both watches the internet pictures did not do the watches justice. They are both beautiful cases and bands. I like the fact that they are hand wound because that makes them a little thinner ( 12.9 mm) and easier on the wrist. Also, the movement can be seen without the usual half moon rotor in the way.
As for the movements, I have not taken them apart but they are certainly not as pretty as even the simplest of ETA movements but I can not comment on their durability or longetivity. The chronograph function on both watches works well except for the small minute register which in both cases sometimes does not return to zero when the return pusher is engaged, but usually does on the second attempt. This could probably be corrected but I am not going to bother. These are inexpensive watches that I choose to wear daily because I like them and I'll probably never bother to clean them because it will be cheaper to throw them in the drawer and buy new ones. I paid less than $150 each, brand new, and if I get 5 years out of them , great. Worth every penny.
Hope that helps, - I'll post some pictures when I get around to it.
Regards,
John Kosmalski