More OEM Minutia, Carpet Backings Options

[StarBear]

@wonkipop
@jeffbowlsby
@van b
@big len
In the midst of finally replacing a few key pieces of my original carpeting. Noticed something somewhat strange (see pics). The backing on the driver’s side (on right) is lighter and kind of light, stiff pvc or something. Stamped with “TSB”. Passenger side backing is black and much more rubbery; not stiff at all. Same situation with the NOS pieces I’m preparing to put in and the NOS passenger mat already in (not in pics).

Any experience, insight, or history on this. These are known (mine) original pieces.
As promised, truly minutia.
Thanks!

Backs of Originals:


Backs of New NOS:

[wonkipop]

@StarBear
if i was forced to stab a guess.
having got them out and looked at them - and having a think about where they go.
i can see a logic maybe. (IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/beer.gif) (IMG:style_emoticons/default/confused24.gif)

the clear whitish resin backed pieces seem to be the ones that had to conform to more complex 3-d contours.

drivers sill has hand brake recess.
bit from behind the passenger seat, pretty sure that is where it went seems to be deformed to accomodate the wiring loom bundle that comes out and heads for the seat belt interlock relay etc. (or maybe i have those two bits back to front in my photo above and its shaped for the hand brake cable guide where its going through the firewall?) the tunnel piece is deformed into a shape near the gear lever.

rest of the carpet only needed to do simple single fold or was flat.
has different thinner less rigid type of backing.

drivers piece seemed to get a super dooper heavy layer of rubberised or vinyl backing probably because they figured it was going to get the most wear and tear?

i think whitish resin piece has something to do with form moulding carpet. just a guess but.

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otherwise its just whether hans or gretel down at the cottage industry made of straw or the other one made of wood produced the pieces and they all ended up in a big bin that got bits of carpet taken out randomly by heinrich and horst!
(IMG:style_emoticons/default/beer.gif)