"Lion Oil Company" porcelain oil field sign 42" x 18"

My wife and I recently moved to a small town in west Texas, to plant a church. I have "picked" quite a few signs out of old barns and buildings in just a few short months. I collect old signs and have bought and sold hundreds over the last 15 years or so. I got a hold of this one about 3 weeks ago. I've seen quite a few "Lion" signs over the years, but never one off of an actual oil field! It's 42"wide x 18"tall and porcelain. I am not completely sure about the age on this one (though I figure 1940's ish). Any comments or info on this sign welcomed