From the same collector as last week’s 2002Ti Alpina comes an equal rarity this week. As with early Alpina and AMG information, details on early Hartge cars are sparse at best. Though Hartge was around as early as 1971, there just isn’t much information on how many cars they built or the exact details. That makes today’s E24 pretty interesting; what should likely be labeled a “H6” isn’t, instead being referred to as a “635CS”. It appears to originally be a 1978 635CSi which had the injection undone. Instead triple Webers adorn the M30, a setup reportedly good for 290 horsepower. But while Hartge badges adorn the car, there are odd details that seem to question the authenticity: