When I was a kid, my Dad showed me how to build a Crystal Radio using a Gillette "Blue Blade" as the detector. (This was back in 1958, when I was 10 years old.)
He told me that a lot of guy's from his unit, (the 100th Bomb Group) were shot down over Germany and spent the war in POW camps. And they made crystal radios in the POW camps using Gillette razor blades that they got from the Red Cross packages.
I don't know if this is true or not, but my Dad told me that the War Department helped Gillette develop the "Blue Blade" with a special coating that could be used for this purpose.....just to provide the POW's in Germany with a detctor to build Crystal Radios so they could receive news of how the war was progressing, and give them hope.
If you Google "Fox Hole Radios", you get a lot of neat information on this subject.
If this is really true, I would think that Gillette deserves some fantastic recognition for their contribution the war effort in WWII!
But so far, I have Googled the hell out of it...(Who would have thought that "Google" would end up a verb!)......but I can't find anything from Gillette that confirms this!
I am just rambling here, but if this is true, I would think Gillette would have some information on this...........I would really like to know if this is true or not!