Decoding Astra Serial Numbers

I’ve noticed that throughout the years, the serial numbers of the Astra sensors have been changing. I’ve had sensors where serial numbers started with 15*********, 16*********, 17*********.

I am assuming those starting numbers refer to the year the sensor was manufactured. Probably the rest of the numbers may indicate the month, day, and any other information regarding the manufacturing of the Astra Sensor.

Does anybody know the exact meaning of the Astra Sensor serial number?