I've got an old glock barrel. Its got to be 25 plus years old? I got it for free from a friend that worked at a shooting range. Its a Glock G17 model barrel. Its in great shape. It barely has wear on the finish. Its not worn through the finish on the top and bottom of the barrel. But its been shot in a gun. I have never used it. But its shiny. From where it rubs, smiley. Its not a pencil barrel. It looks like the old tenifer treatment finish. That has the dull matte topcoat? The barrel has no serial number at all. No L***** marking at all. For the barrel serial number. The right side of it(ejection) side) has 9X19 at the rear. The Glock mark to the front of the center. And a penastar at the front. All of these marks are on the top line where a normal barrel is marked with the serial number. No other marks at all. It appears to be a normal glock barrel. And drops in the G17 gen 3 that I had out to compare the barrels. The lock up is the same as gen 3. But the upper rear of the breach is way thicker on the unmarked barrel. If anybody could be of any help determining what gen or how old this is that would be great.