What does the # 8 on the barrel flat mean?

[Tennessee Dave]

This is a Vulcan grade Parker with serial # 110413. I am wondering what the # 8 means that is in the area where the frame size usually is. The gun is advertised as a 12 ga. Did they make a 12Ga. on a size 8 frame? I tried to post just the picture of the barrel flats, but it wouldn't let me. Next to last picture.

https://www.gunbroker.com/item/1109759158

[Jim DiSpagno]

It's a 2 frame gun. The "8" is probably an inspectors mark

[Keith Sirmans]

Originally Posted by Jim DiSpagno

It's a 2 frame gun. The "8" is probably an inspectors mark

That's what the K is

[Researcher]

No one still alive knows.