Please help me ID this Chinese? 7.92x57 ammunition. I have a sealed 500 rd case, and about 300 rds in loose white cardboard boxes of 25. I purchased it around 20 years ago. Red lacquer sealed case mouth, no visible sealer on primers. Possibly light clear sealer. Green painted wood cases with rope handles, sealed can inside. I bought it a long time ago, back in the mid 80s most likely. Functioned well in FN49, Hakim, 98 Mausers. No misfires, seemed fairly consistent as I recall.