Big Beautiful Marietta #10 cast iron skillet. Bold markings on the bottom. Has about 1/16 movement. This IS a spinner on a glass top stove so it would be best suited for gas or coil electric stoves. Also marked R & C (Reinhold & Co) which dates this pan in the 1870s-1880s. Pan is in great condition for its age. Has been cleaned via electrolysis and seasoned with my own blend of natural Pennsylvania beeswax, crisco and olive oil. Wiped down with food grade mineral oil to protect it from surface rust.