First time Parker owner that's confused.
 

Thanks in advance for any help. According to my research this gun was manufactured in 1906 but I didn't think that the 20 gauge was introduced that early? I guess I'm totally wrong on that? I'm also having a difficult time deciphering all these stampings? Please don't beat me up too bad. Thanks!

The book indicates your gun was a 16ga. That notwithstanding, the 20 was introduced well before 1880.

I figured I must have been wrong. Can you tell me anything else about the markings? Thanks for your help?

Welcome Darren, 0 on the back lug is the frame size, W.K. in the oval is for Walter King, guns works supervisor, T is for Twist barrel steel, 3 w/the smaller 2 is the unstruck(prefinish) weight, c is unknown but may be an inspection mark, P on the water table above the serial number is the grade. Also known as a grade 1. A zero frame P grade 16 gauge Parker is very sought after. Please show us the rest of the gun. Congratulations on what looks to be a nice gun.

What Dean said. More pictures of the gun will help. The more the better.

Thank y'all very much for all the info. I'll post pictures of the gun later when I get back home. I'm pretty excited about it.

the 3/2 mark is the unstruck weight of the barrels, not the full gun

Excuse my ignorance but what exactly does that mean? This is my first double barrel.

The weight of the barrels before filing, fitting, surface finish, and approval.

So 3lb? 3lb 2 oz? Why 2 numbers?