Hi Ross,

I had a similar moment of worry when I looked at some of the ICs under an
illuminated magnifying glass and just saw a blank top with, apparently, no ID
markings.  Then by accident, I slightly tipped the top face of the IC away from
the light so the top was illuminated tangentially and voila - out popped the
lettering in a faint silver glow.  In my case, it seemed the silver lettering
was very difficult to see if illuminated directly with a bright light source. 
Try gently re-orienting the IC under the light and see if you can make out the
letters any better.

73,

John VK7JB


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