Interested in purchasing a 1960s vintage European-style rear lock that mounts to a chainstay bracket. Sorry, wish I could describe this item better, but they essentially look like a "slide bolt" that is mounted to a brazed-on rectangular bracket, typically on the left chainstay.
Believe they are most often used on city or commuter bikes.
Please contact me offlist if you can help.
Regards,
Kevin Kruger - Grantville, PA