Serial number range: 2749631-3815124 (1975-1997, approx. 14,702 produced). Production by year: 1975: #2749631-2750630 (1,000 units); 1977: #2853851-2854850 (1,000 units); 1978: #2913801-2919900 (2,000 units); 1981: #3114001-3154500 (1,700 units); 1982: #3220001-3221000 (1,000 units); ... ; 1992: #3603070-3603669 (600 units); 1993: #3617898-3617899 (2 units); 1995: #3680931-3681530 (600 units); 1996: #3737701-3738700 (1,000 units); 1997: #3813125-3815124 (2,000 units)