I really don't know much about Teun or the brand, I only know the shop used to be at Oostplein, Rotterdam, and I only ever saw two Visser bikes. Shown example belongs to Freek whom you might know from the classic bikes circuit. I saw the bike when I went to pick up something I bought from him a couple of years ago. I'm sure he doesn't remember me, but he seemed like a nice chap and I instantly fell in love with his Visser.
The second Visser I saw locked "backstage" during an open air fair on Noordplein in Rotterdam where I had some business, hence me being in the crew area. It wasn't as beautiful as the one shown above but it was the same colour and it had the same kind of appeal. Every now and then I've been entering "Visser" as a search term on mp ever since, but to no avail...