The Soviet “Lifchik” (Russian for brassiere) chest rigs are clearly based on the original Chinese design which was commonly encountered by the Soviets during their Afghan War.
Sample 1:
Shorter webbing straps at bottom are attachment points for a Poyas B VOG grenade belt (was not found with this item). East German AKM sling was added to reversibly expand harness length.
Ends of straps have white material with blue markings:
Tabs are leather:
White fabric reinforcement at tops of pound on inside:
Stamps on back:
“OTK 7” is quality control stamp. 
If it is real it was probably made in 1989. 
Unsure if chest rig is original or reproduction for now (as of April 7, 2019, waiting on positive, cite-able proof of either case).
Sample 2:
Same materials and very similar features as Sample 1, but more wear and tear.
Leather tabs for magazine pouches:
Also has white material on inside lip of pouches.
Stamps:
1988 Date 
Triangular stamp not found on Sample 1.
On back side.
Straps:
Cloth tabs at bottom are not white with blue markings like Sample 1.
Usage Photos:
The Poyas A shown on this page with the leather pouch flap and metal stud pouch securing mechanism was most commonly used after 1989. It is most often associated with the Chechen Wars.
First Chechen War (December 11, 1994 – August 31, 1996):
Second Chechen War (August 26, 1996 – April 16, 2009):
