In my opinion, no. I have seen the word used a lot by sellers of this and similar Bleecker (tattersall) bags, but I'm not convinced. The Leather Dictionary defines vachetta as:
"...untreated Italian leather often used in luggage and handbag trimming. This leather, which stains easily and darkens in sunlight, has been popularized by high-end brands such as Louis Vuitton and
Coach...Vachetta leather is natural coloured and mainly used for bags, suitcases and saddles. However, it is also offered pigmented and/or embossed."
I've never seen a catalog description for these 2007 Bleecker tattersall bags that mentions vachetta. The creed on my former tan Bleecker Shopper 11420 doesn't mention vachetta. On the other hand, the catalog description for the Poppy vachetta line does use the word vachetta.
If someone can find a Coach catalog description for the black Bleecker shopper that uses the word vachetta, I'll change my opinion!