Kmart NOS Platinum Chrome Blades

I just won an auction for these kmart branded blades:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&_trksid=p4340.l2557&rt=nc&nma=true&item=220756929995&si=QF%252FOKcmPZgC9maTvRlFVy%252BYft9o%253D&viewitem=&sspagename=STRK%3AMEWAX%3AIT


These look like the same packaging as ASR blades. Any idea on age? I'm assuming they will be fine to shave with. For $2.99 shipped, what the heck.

I can't remember where I found the information but these blades are from the mid 1970's. Here's a pic of the back of the packaging.

Also, here's another link that talks about the patent number found on the back of the packaging.

Although it's nothing conclusive, it makes for a very interesting read.

They are ASR blades from the 70's. The are pretty sharp, I usually could get several good shaves from one blade.