I have been looking at several Japanese 7.7mm cartridges and the color coding.
In the first two pictures appear a 7.7x56R cartridge that should be an ball round. It was manufactured around 1927/1928 by what became the Tokyo Second Army Arsenal, However, according to the color coding for IJN cartridges, the neck band should be black for Ball, but if you blow up the picture it is purple, which should indicate HE. It should not be an HE round as it has a pointed tip, rather than flat.
The third picture is from my collection. Two IJA Type 92 7.7x58SR rounds are depicted. The one with a black neck band is clearly AP and reacts to a magnet. The round to the right has a purple neck band, which according the army color coding should indicate HE/Incendiary. The bullet reacts to a magnet and does NOT have the flattened tip of the normal HE/Incendiary cartridge. I suspect it is also AP despite the neck band color.
Can anyone explain these discrepancies? Any help would be appreciated.
Frank Allan FCALLAN4647@yahoo.com