Very nice lid in great vintage condition, # 18 Lid only- sits flat/level. Original knob tight and free from damage. still shiny. Enamel is still shiny as well. No chips in the surface, 

the bottom rim edge has some flea bites around it.

 No cracks, no repairs. measures approx 7 1/4" to 7 1/2". France.

Would make a nice addition/replacement to your cookware.