Just an observation based on seeing several coupes with original blue leather seats at the Vintage in very good condition. My seats were the original open pore tan pigskin and I nurtured them for over 30 years but they still cracked and decomposed so I finally replaced them with new leather. I would think that based on the numerous pictures you can find of disintegrated tan leather seats that cow hide is/was far superior to pigskin. (Yes Bmachine, this should be in a separate discussion )
Doug
Doug