Serial number range: 1119001-3722802 (1953-1995, approx. 55,152 produced). Production by year: 1953: #1119001-1119200 (200 units); 1957: #1477001-1477100 (100 units); 1958: #1580001-1581000 (1,000 units); 1959: #1651001-1682000 (4,000 units); 1960: #1740001-1819000 (8,500 units); ... ; 1991: #3574634-3575633 (1,000 units); 1992: #3594960-3608369 (1,250 units); 1993: #3615580-3644475 (3,101 units); 1994: #3665831-3666030 (200 units); 1995: #3687031-3722802 (5,100 units)