Dewcrew8,
That does sound old. Probably from before Hodgdon hooked up with ADI and probably made at the same plant that used to make the Brigadier stick powders, which were very similar to the IMR stick powders in many respects. Better quality, IMHO, than the stuff made on this continent as, like Vihtavuori, they used more expensive cotton fiber-based nitrocellulose, so it burned cleaner. Unfortunately, that plant burned down and was never rebuilt.