All About Pocket Knives

Just acquired this beautiful Imperial knife:



I'm wondering if there is a dating chart using the numbers on the blade to tell the age.....similar to the way Zippo lighters are coded.

Any help would be greatly appreciated.


BTW, the numbers on this knife are:
2170537
2281782

http://www.allaboutpocketknives.com/kni ... rt#p148353

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Bob

very helpful thanks!