This is a bit of a foggy memory, but I remember Damon was experimenting with using the casings instead of the ink to color code the motors (green for single stage, purple/upper, red/boosters) for the expanding hobby store market. At least I remember only seeing these colored casings in a particular hobby store in Athens.

Who knows? maybe their casing supplier was just short handed on regular kraft paper and sent them these instead. I have a couple of Estes mini booster motors made in spiral wound glassine covered casings, and I have a whole bag of green casing Centuri mini-B motors.

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Roy
nar12605