I don’t know if anyone has already explained this but apparently, the first 2 numbers are the die number (batch number?), the next 2 are the employee number, followed by the Quality Control employee number and finally the year of manufacture.
Bought this secondhand around 10 years ago. Have no idea what wood it’s made from, probably an exotic Indonesian hardwood. I was very impressed with the trigger guard which is made from the same wood. GinB certainly turned out some top rate stocks.