IIRC there was a gap between when the movements were stamped 'SU' and when they started using 'RUS'. That was also around the time when the factory alpha prefix was common (i.e. the 'P' in P3133). So it is possible that your watch is made with a movement made from parts dating back to about 1992-95.Thank you guys.
What baffles me is it doesn't have "Made in Russia" on the movement. The dial says "Made in Moscow" as I recall. Can't double check since it's stashed in my watch box at the moment.
It is an authentic Poljot (purchased from a very reputable dealer NIB). I was just wondering about the movement.