Getting curious about East German optics and wondering which models were fielded and in approximately which years they would have been used. I have seen pictures of NSP-2 optics setup on what I believe were early MPiKMs; I also know the ZFK 4x25 was used in the late 80s on the MPiKm74; I dont however know if they had a BDC for the M43 round for the late model AKMs. I dont know what were used to fill in the gaps with between the early 60s and MPiK and late 60s MPiKM service w/ the NSP2 and the MPiKM74 and the ZFK. Are there other daylight and nighttime optics that were used by the NVA? Anyone have photos or published sources they could recommend... (German language is okay for me)? Anyone have a source with info on what was made and when in the DDR? Finally, curious as to which optic/s would have been fielded on a '69 MPiKM in its first few years of service (daylight and/or night)? Thanks.