Serial number range: 2400001-3720302 (1970-1995, approx. 35,954 produced). Production by year: 1970: #2400001-2464500 (4,000 units); 1972: #2505601-2545700 (3,200 units); 1973: #2627051-2628050 (1,000 units); 1974: #2714001-2715000 (1,000 units); 1975: #2748131-2761150 (1,500 units); ... ; 1990: #3533968-3534467 (500 units); 1991: #3566873-3567472 (600 units); 1992: #3583861-3608019 (402 units); 1993: #3614980-3617883 (452 units); 1995: #3686231-3720302 (1,100 units)