Joined: Apr 2008
Posts: 2,638
Likes: 14
From: Maidstone, Kent, England
Bikes: 1970 Holdsworth Mistral, Vitus 979, Colnago Primavera, Corratec Hydracarbon, Massi MegaTeam, 1935 Claud Butler Super Velo, Carrera Virtuoso, Viner, 1953 Claud Butler Silver Jubilee, 1954 Holdsworth Typhoon, 1966 Claud Butler Olympic Road, 1982 Claud
It's a feature of the British "Vindec" brand - they also made motorcycles back in the day. Not particularly low end. I used to have a Vindec Clubman frame with these rivet heads on the seat stay eyes - a really comfortable fast touring bike. Sorry no photos.