This is an authentic chip. (date codes may vary)
We also have other authentic high quality op amps such as AD827SQ/AD843SQ/ADA4637-1BRZ/AD8620BRZ/OP42EZ/AD843BQ from ADI and OPA627SM/OPA627BP/OPA2211AIDDA/LME49720HA from TI. Please feel free to ask and request photo of them. Beware that there are lots of fake op amps on the internet market.