I couldn't find anything like this on a site search so I thought I'd contribute mine. :-)

When I lived in England, these were the windows in my flat, in an 1878 Victorian semi. They were double-hung drop sash windows, with marble sills. This model is a replica of those windows; they are true to life except for the actual weights inside the frame.

No textures are included.

The window is grouped, ready to link or append, and all parts are parented to an empty axis. You can modify the depth of the sill and frame to suit your wall. Additionally, there are unjoined duplicates of the hardware bits on layer 2.