No way to answer without the serial number.
1977
@1970
1908
1969
Please check the link for the Manufacture Date codes details on the Remington Society of America.
Your win mod 9422M was produced in 1980.
Deiter Marschall's book has Walther sn data
You forgot to provide the serial number. The -1 was made from 61-87
"AX" prefix indicates 1981
No way to answer since a serial number was not provided.
1969