Trevi Series 2 had Zegna cloth upholstery so I presume other Betas would have had it too.
And just to show what a silly sorry person I can be, I have Zegna Cologne (in fact I have two
) which I only wear when I'm with the Gamma which is Series 2 with Zegna L-Cloth interior and never while in the Trevi which is Series 1 with plain woolcloth interior