Unbranded #7 Flame Orange Enamel Cast Iron Skillet 4 Notch

A vintage mid century enamel cast iron skillet fry pan. Flame orange red color with blue/gray interior. Groove handle with 4 notch heat ring. No maker marks - looks to be stamped 7 under handle. Japan? Size 8-3/4" diameter at rim x 1-3/8" deep... length 14"... weight 3.5 lbs. Used condition with some rim enamel loss, one handle chip and one very small bottom chip. Nice cook surface. Cleaned and ready to use.