SC on Gunbroker
 

Check out Item number 553896534 on Gunbroker. Is that a replacement stock?

Yes

there's no checkering on the side panels of the stock. Is that the indication its not a factory stock?

It's one of those real early prototypes from 1902:rotf: The more you study stock shapes, checkering patterns, and checkering borders will, in most cases, help you identify original Parker wood. There are some stockmakers past and present that can fool you.

Lack of checkered side panels, completely incorrect wrist checkering, the shape of the cheek panels and how fat the wrist is are all indications of the stock not being original. And the fact that it was built in 1902 as Chuck pointed out.

The comb is ok looking...

the seller tells me the ser number is 185508 which would make this a 1919 trap gun

Well, for what I consider short money, I'm buying this trap gun whether the stock is original or not. I need a trap gun and this will do, not as a collector but a shooter. Turns out tho, the real owner of this gun has other Parkers he may be willing to sell and I'm expecting a call. So, all in all there may be some gold behind this hounds tooth! Lol

looks like a nice enough gun to me.. I'd like to find a PG SBT with a bad barrel. I figure it would make a heck of a nice stalking rifle.

Thank you Edgar. I spoke today with the sellers, they're a married couple in their 80's who've owned their sporting good store and gun shop since the early 60's. They're handling this sale for one of their local customers whom I expect to speak with in the next several days. This gentleman, I'm told, has other Parkers he may want to part with. Another 20 ga Parker or 16 would be fine by me regardless of grade. I've wanted to pick up a SBT for awhile but didn't want to pay a small fortune as I shoot trap intermittently. This one will work out fine.

Looks like there may be cracks in the for-end wood that may need to be fixed.