AMD K6 233ANR
As mentioned here I have a few 233MHz-rated AMD K6 chips with slight differences in appearance.
This particular model is made in the 49th week of 1997 and has the regular AMD K6 print with just the QR-code in the left bottom. Older models don't have the QR-code and newer models have both the QR-code and speed-rating engraved. This was done to prevent tampering with the printed logo: it was easy for scammers to reprint a 200MHz logo on a 166MHz chip and sell it with a higher margin. The engraved speed-rating is far more difficult to falsify.