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NE555: NE555P: The discrepancy of two countries

Part Number: NE555

Dear Sir/Madam,

Part number: NE555P

My company got new parts NE555P but we noticed that the outlooks and X-ray lead frame weren't same as last time we got. 

Could you help to verify are they real parts as our vendor claimed those are come from distributor,please!

The suspect new parts: Date code 1952 and COO China   

Last time we bought: Date code: 1945, COO: Mexico

Thanks a lot!