When was my semi-auto shotgun made?

Semi-Auto Shotgun Model : (Years of Production) / Serial Number Prefixes

Centurion® (Japan): (1972 – 1975) / A -NA Prefix

Centurion® II (Japan): (1976 – 1981) / A – NA  Prefix

Model 82 (Japan): (1982 – 1989) / 82- Prefix

SAS (Japan): (1999 – 2002) / SA  Prefix

SAS (Italy): (2002 – 2007) / Q  –  X  Prefix

SA-08 12 ga. (Turkey) : (2008 –) / AD Prefix

SA-08 20 ga. (Turkey) : (2008 –) / AE Prefix

Element 12 ga. (Turkey) : (2015-) / RL  Prefix

Element 20 ga. (Turkey) : (2015-) / RM  Prefix

18i 12 ga. (Italy) : (2019-) / NM – NN  Prefix

18i 20 ga. (Italy) : (2019-) / NP  Prefix