From a google search
#20, has two stores at the same address. Valentino Boutique for women carries the ready-to-wear Valentino line, the less expensive Miss V, accessories, handbags, jewelry, knitwear, umbrellas, beachwear (in the summer), robes and nightgowns, lingerie, knitwear, and umbrellas. Evening gowns are always feminine and there are lovely jewelled belts. Valentino for men has two lines of menswear as well as accessories, shirts, ties, socks, belts, underwear, knitwear, and small leather goods. Just around the corner on Via Santo Spirito 3 you'll find Oliver, also by Valentino (named after one of his dogs), with a complete line of clothes for male and female designed with a younger (read less expensive) spirit.
Nos sure if this is the same Oliver being referred to, but this site
prices Oliver suits at $525, so you may have saved a tidy amount.
Another source: from 1991, compares Oliver, launched in 1980, to labels like Made (Krizia), Versus (Versace) and Oaks (Ferre), with comments by Versace owner on Oliver.
Further research is recommended.