Serial number range: 2748631-3712302 (1975-1995, approx. 17,051 produced). Production by year: 1975: #2748631-2749630 (1,000 units); 1976: #2776451-2777450 (1,000 units); 1977: #2814901-2867800 (2,500 units); 1978: #2914801-2947200 (2,500 units); 1979: #2987101-2993700 (2,000 units); 1980: #3044101-3073800 (3,000 units); 1981: #3127001-3128000 (1,000 units); 1982: #3164001-3165000 (1,000 units); 1988: #3478901-3479100 (200 units); 1989: #3486401-3486700 (300 units); 1990: #3523796-3524295 (500 units); 1991: #3563873-3564372 (500 units); 1992: #3598820-3599219 (400 units); 1993: #3610680-3637775 (451 units); 1995: #3680031-3712302 (700 units).