Serial number range: 2242001-3222300 (1967-1982, approx. 8,016 produced). Production by year: 1967: #2242001-2242050 (50 units); 1968: #2260501-2279846 (116 units); 1969: #2370001-2380700 (1,600 units); 1970: #2434751-2435750 (1,000 units); 1971: #2477701-2478700 (1,000 units); 1972: #2514101-2515100 (1,000 units); 1973: #2557551-2558550 (1,000 units); 1977: #2841051-2862800 (1,500 units); 1978: #2933101-2933350 (250 units); 1982: #3221801-3222300 (500 units).