Here is a rare pic, probably from the Lark press kit. I scanned it from the Autosport page below.
This maybe 13R or 14R in the Lark presentation livery, Maybe our forum friend Andy Blackmore will be able to enlighten us.
Another livery for the model makers

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Small report on 13R,s first win.
Sami, you may like to read the LeMans return article above, although it does not say in the text, but 10R was used for all the LeMans durability work. Look who,s in the driver list, I knew I had it somewhere

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Thought I,d put this in here as well, although I have not got the whole article, I think the pic is rather nice with 14 just ahead of 13, but well ahead of the following pack