If the name of the window is not known, you should look for the name;
1. on the locks.
2. lower the top sash and look up in the header.
3. Tilt the sashes in and look on the sides.
Depending on what you find, you may have to call some local Home Improvement/Window companies to see if they are familiar with whatever info you find.
© 2016 Renovate Your World LLC