Tzazilas

I tend to overthink sometimes and miss the simplest of things. I guess patina is the answer. The product shown was advertised as new, so most likely its patina process was speeded up. Perhaps some neatsfoot oil etc with sunlight for some days.

Hi and happy new year! I came across this leather shown in the picture. Any idea about what leather is it or the technique to achieve this two-tone look (tan + yellow)? Is it a tan leather painted with yellow (acrylic?) dye or some yellow leather dyed brown? Or some pull-up leather? Or a natural veg. tanned leather dyed with tan and yellow dyes at different areas? Any help with this mystery leather would be very appreciated!