Now there's a classic. Although I quickly progressed to a Tiger Cub, I actually learned to ride on a 175 Tigress (belonged to my Mother). Do you remember the adverts in the magazines - a big guy at the Meriden factory with welding goggles on, holding up a Tigress frame he'd just finished? I think Triumph were trying to tell us they were really motorcycles, not poncey scooters!I also like the Triumph Tigress scooter. Another classic.
By the way, there's a beautiful one on display at the National Motorcycle Museum.