We never saw the Concentric until the first 1968 model showed up in September of 1967. I was standing in the shop doorway when they rolled it in. We were more excited at the time about the new DLS front brakes and the big numbered instruments. The new carbs were way on down the list.
Details of my own sons births are fading, but I remember that event well.
Bob, That would be a very dark shade. To even approach that colour tone you would need to use the gold under coat, the white makes it much lighter. Seems there are as many variants (interpetations) of 'Aubergine' as there are stars. Don Hutchinson has, what I would call, the most accurate match to the original.
The base color on all 1967 Triumph gas tanks (except early Bonnies) was Alaskan White, with the second color, Aubergine (purple) in this case, painted over it. My '67 Bonnie was this color. I stripped the paint off the tank prior to a re-paint, so I know this to be the case. The early Bonnies had a gold underbase, with Aubergine painted over the gold. Pin stripes were white. My cousin Mike got one of the first '67 Bonnies in October '66 and both he and the dealer were horrified at the gold/purple color scheme; it looked like an Easter egg. He had the tank re-painted in candy blue before taking delivery of the bike. Unfavorable dealer reaction to the gold/purple paint scheme caused Triumph to make the color change.
"Unfavorable dealer reaction to the gold/purple paint scheme "
No accounting for taste, is there? When I had finally scraped up the coin and rode into Sherman Oaks to buy my '67 I discovered that I was too late... no more gold. I had to settle for the Alaskan White. But you are probably right... it was maybe a bit too psychedelic for non-Californians. It's now due for a re-paint and I am sorely tempted to pretend it used to be gold.
I have to say, though, that the next year I bought my '68 TR6R for long distance hauls and it is still my favorite all time color scheme. Riviera Blue and Silver. Very faded now but still beautiful.
"It's now due for a re-paint and I am sorely tempted to pretend it used to be gold."
Plus one for that - if I had a 67 Bonnie which missed the change, I think I'd waive the originality on that one.
Have a look here (pages 2 and 3), which show that they used the sexier 'swoop' over the top of the badge scheme at one point (like the TR6R of the same year), rather than the (in my opinion) less exciting 'under the badge' scheme (like the TR6C), each of which is shown on page 4.
Just to further confuse things, when at the Canadian Vintage Motorcycle Group's 1996 meet in Paris, Ontario, I saw two original 2-1/2 gallon 1967 Bonneville tanks with the "over-the-top" two-tone color division as shown in the above brochure, but both tanks were painted Aubergine and Alaskan White. Maybe this was special for the Canadian market?