Welcome to SRP!

I know there are usually several Vitas on ebay so they are somewhat common, but I don't know anything about them.

The Roffler is from the late 1950s. It was supposed to be a high end shaver, but I've never shaved with one.

The Tondeo is a shavette and still in production. Not sure of the date on it, but I'd guess the 1970s - the 2016 model looks just like it. You can buy blades for it Walmart I think.