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Mystery graphic on TM9 covers

PostPosted: Tue Feb 11, 2014 1:10 pm
by pfarber
I noticed this little gem on some TMs.

leaf1.PNG
leaf1.PNG (453.92 KiB) Viewed 4982 times

leaf2.PNG
leaf2.PNG (222.44 KiB) Viewed 4982 times


Note just under the "TECHNICAL MANUAL" line... what looks like a clover and a leaf. Its also on other TMs I have:

machinist.jpg
machinist.jpg (20.27 KiB) Viewed 4982 times


This TM is printed 1941 at the US Government Printing Office.

It only seems to show up on TMs dated 1943 and earlier. Not sure what it is, or what it means. A quick way to tell what printer it came from??

Any ideas????