Uh-oh...... Well, if they are ancient like you, I might be able to outrun them.... Maybe not. I don't run so pretty anymore. Nor do I have the will power. Happens when you get over 70. I just told someone yesterday that last year I rolled over a 1 Ton square boulder. Just 11 months later I almost couldn't do it.
Take a look at the last S in PLURIBUS and the second T in STATES. Compare that to the 1938 reverse you posted. They are the same. On the 1939 reverse (commonly referred to as the 1940 reverse) the S has a serif on the top curve of the S (perhaps the fastest way to determine whether your worn 1939 has the '38 reverse) and if the second T in STATES doesn't have the split on the right end of the crossbar (this is usually not as available to use as a diagnostic as the S in PLURIBUS). Steps on circulated 1939 nickels are the least effective way to determine if your specimen has the 1938 reverse because it receives the most wear (high section of the relief). Great for AU/BU specimens...but then all the diagnostics are available at that point.
My Mom was born in Lincoln, and she was one of 10 kids. In 1993, we attended my maternal grandmother's 100th birthday party in Lincoln. There were more than 300 relatives who showed up for the shindig. Chris
PS - Check your 1939 Jefferson Nickel hoards folks...you may have a few higher value specimens you didn't know you had.