Alan
RA-85123 was last noted in 2016 as Kontinent (AviaPrad c/s), but with "This Day Congratulations to Russian military Fleet" body t/s but was then stored Samara so seems to be on the move again. As it appears to be going to Chkalovsk I can only think it is Air Force/military now, as no one other than Alrosa operates Tu154's nowadays
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