[Nathan Slingerland]

That label is printed in a dark navy blue. I previously created a repro of it here:
http://philcoradio.com/phorum/showthread.php?tid=13296

In many photos the label has darkened and almost looks black. The original color shows up a bit better in this photo (compare to the black tube bases).

https://drive.google.com/open?id=0B64cfW...083UFZiZ2s