A few questions for the Parker experts
 

I have a Parker and the factory letter says it was shipped in May 20 1905. The gun has the T-type pinned wear plate that was patented 8/15/1905. The water table is not stamped with the 1905 patent date. Was the gun shipped with the 1905 wear plate or was it added at a later date?? Opinions please.
Picture below
http://i156.photobucket.com/albums/t...DSC_0022-1.jpg
The barrels flats have a stamp WK in a circle is this the Walter King stamp that is thought to be a barrel quality stamp?? Picture below
http://i156.photobucket.com/albums/t...r/DSC_0025.jpg

Also, according the TPS page519 Vol II the end of a 12 ga. chamber is .798 (C Dia. small end) Does that mean that the proper chamber length gauge for a Parker should be .798 dia.???
Thanks Craig (just trying to educate myself)

Craig, Many guns were retrofitted at the factory for the 1910 bolt plate. Yes the "WK" is the barrel stamp for Walter King. As far as chambers go I think the .798 is a starting point I have seen some variances in chamber diameters.

Refresh our memories here, Craig. Do you have your PGCA letter yet? It may mention a return to the factory between 1905 and 1910. That could explain the early bolt plate. Otherwise, I would assume that the gun was fitted with the 1905 plate while the patent was being approved.

Bill: I do have a letter and no mention of a return to the factory.

show us some pictures of this gun craig...looks interesting... charlie

Craig,
My guess is your gun left the factory with the new wear plate. Murph is probably right. The gun was fitted with the plate with the patent pending. Also, as Dave says, I too have seen variances in chamber ID's especially with damascus/twist barrels.

A question about the removable wear plate Craig. There were two styles of "T" shaped and pinned plates, the 1905 design and the 1910 design. The 1910 plate had flats cut into the sides of the plate and the bolt was manufactured to engage the plate more positively than the 1905 design. Which design do you have?

Dean: My gun has the 1905 design, just a plain block letter "T". The newer design appears to have two tapered surfaces on the top ends of the "T", correct???
According to TPS the lowest serial number with the 1905 patent date is 131179, my gun is 131942 so it is close to the time of the change. I would guess Parkers were not assembled in exact serial number sequence. Thanks for the help Craig

That's right Craig and that is the 1910 patented design.

Craig said he had the one surface 1905 plate. I have to review my TPS reference to this. Whatever the situation, I don't change them or try. In 1972, LDG Sr. did a 1910 plate conversion on my 28 gauge VH. There was not really a need for it, but I thought I wanted it. How was I to know that I would still be shooting this gun 52 years after I bought it? I have never bothered to convert one since.