The following photos are from GUNS.RU, https://forum.guns.ru/forummessage/216/2354117.html, and show 2 variations of the 7.62x54mmR duplex cartridge. Designated 35VZH (second version) and 9-A-4011.
These were apparently developed (?) / produced at the Novosibirsk Low Voltage Equipment Plant during the 1970’s
Can anyone provide more information on the 7.62x54mmR duplex cartridges?
Corrections, information are most welcomed!