Interior question 914-6 Options

[TedK]

Picked up my 914-6 about two months ago, just received my COA where the interior is listed as follows:

Black leatherette / 11

Now, my car has a basketweave interior, so I thought the original "smoothie" had been replaced, but I was just looking at an older COA on a closed Ebay listing for a same-year 914-6 and it read like this:

Black leatherette / basketweave 11

Anyone know what the "11" means? Could my basketweave interior in fact be original?

Thanks

Ted K

[Porsche Rescue]

I am sure the '70 six came with basket weave seat inserts and smooth door panels, regardless of color. I have owned both black and tan with original interior (four was the same).
I am pretty sure that the '71 six had smooth seats and door panels, same as '71 fours. I know that to be true about the fours but have to hedge a bit on the sixes since they are pretty rare.