I have posted here before that I track US/NA market coupe build dates. Lately I have been asking for sequential VINs from the BMW Archive to see if there is any correlation to date or color. Here is an example:
2240907 (Stan's) built 6/28/73 Chamonix to Hoffman 7/20/73
2240908 built 6/26/73 Chamonix to Hoffman 7/06/73
2240909 built 7/11/73 Chamonix to Hoffman 7/11/73
Consecutive VINs, same color, different build dates
Some more:
4310006 built 01/08/74 Fjord to Hoffman 1/16/74
4310007 built 12/28/73 Baikal to Hoffman 1/16/74
4310008 built 01/15/74 Granatrot to Hoffman 1/15/74
What I can only presume is that Karmann perhaps painted the same color at one time but when shipped to BMW they were assembled on different dates. But when looking at the 431xxxx coupes that doesn't hold up. Except in this case they were delivered to Hoffman on or near the same date. (Hoffman meaning FOB/title transfer in Germany)
So, still no rhyme or reason to hang a hat on.
2240907 (Stan's) built 6/28/73 Chamonix to Hoffman 7/20/73
2240908 built 6/26/73 Chamonix to Hoffman 7/06/73
2240909 built 7/11/73 Chamonix to Hoffman 7/11/73
Consecutive VINs, same color, different build dates
Some more:
4310006 built 01/08/74 Fjord to Hoffman 1/16/74
4310007 built 12/28/73 Baikal to Hoffman 1/16/74
4310008 built 01/15/74 Granatrot to Hoffman 1/15/74
What I can only presume is that Karmann perhaps painted the same color at one time but when shipped to BMW they were assembled on different dates. But when looking at the 431xxxx coupes that doesn't hold up. Except in this case they were delivered to Hoffman on or near the same date. (Hoffman meaning FOB/title transfer in Germany)
So, still no rhyme or reason to hang a hat on.