Teardrops n Tiny Travel Trailers

I was at my buddy's brother's house last night and came across a VERY rusty cast iron skillet in the barn of his newly acquired house. After some bargaining, I snagged it up for $1.50

This is after scrubbing with an SOS pad and coating it with butter, followed by a session in a low-temp oven. I have since re scrubbed, re coated, and is in the oven at a slightly higher temperature. It is starting to look better... one more treatment and I might feel comfortable eating out of it haha. Next time I cook something with animal fat drippings, I will likely get out the entire set and season them all.

There is only ONE marking on it, which says 3X on the bottom in about 3/4" lettering in plain font. I have little knowledge of old cast iron, but I had to have this little baby skillet. I have two 10" dutch ovens, a couple 10" skillets, a griddle, and one skillet that is likely 18-20". Now I have this little 6 or 6 1/2" skillet to go with the collection! They are all store bought cheapies, but they get the job done when cooking over a fire




So is this just an ultra cheap cool old 6 inch skillet as I presume, or have I managed to stumble across anything special?

I'm thinking later (1970s-80s?) Birmingham Stove & Range Co. but need a photo of the bottom to tell including showing any writing if it has some and the underside of the whole handle.
Steve