Tom, Dave, thank you for the helpful replies.
Tom, I imagined they might have come off of a DWM or an Erfurt simply because they were so well worn. But, that was just me guessing. Except for the chip, the wear is fairly even and just high point, so to speak. My buddy will be pleased with your estimated value range as I am sure he did not pay much for them.
Dave, you provided an interesting observation. But, I am not sure if these grips fonts are "fancy" or not.
Here are some close up shots of each grips' "15" stamps. Do they provide any additional insight for you?