"19th Century Rack And Pinion Rack"
Small wrought iron rack spit holder, 19th century. Sliding adjustment hook on an inverted rack allowing the height of the spit to be adjusted, and therefore the proximity to the fire. Rack attached to the tripod by a square nut. See photos for details. Height 46 cm 
Le Magazine de PROANTIC
TRÉSORS Magazine
Rivista Artiquariato