Reinhardt, the powder was sulfa. A half century has advanced pharmaceuticals. What was then a new compound is long obsolete. The ying/yang symbol is from the far east and is associated with many religons, most closely taoism. It represents the duality of nature. I'm not sure which unit it did, or is meant to represent. Did you know the swastika was on Arizona road signs and a army unit's shoulder patch before ww2? It is a universal symbol and I can show you an ancient pictograph of one on the grand Canyon Mule trail. Hitler was a lousy artist and had to taint an old symbol. According to a local D-day vet, they tapped the enbloc clips for the M1 rifles to dislodge any sand. Original uniform items are extremely expensive ( and fragile). There are many re enactor groups that portray various units. they go to great lengths to replicate everything. They would be your best bet. Sometimes an item remained in service for many years and later issue can be reconverted.