I did an article on that gun, Frank Tobin's personal gun, in The Double Gun Journal, Volume Eight, Issue 1, pages 171 to 176. At that time it was still in possession of the Tobin family.

BHE Parker Bros.

Attachment 90749

Tobin

Attachment 90750

Yup, same engraver for sure. Thanks Dave.






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The Tobin locking system seems really good to me. It has horizontal rotation vs. the Brown axial (?) rotation that LC Smith, Fox, and the NID have. Both systems seem very plausible and strong to me. I've always liked the idea of the Greener crossbolt too, but I have only read of the later Baker using it, in American doubles.

Edward George Parry used the "Greener" cross-bolt in his guns. In conjunction with his patented "rear acting" under-bolt on his Quality 2 guns --

Attachment 90771

Attachment 90772

and alone on his Quality 1 guns --

Attachment 90773

The Tobin bolting system looks for all the world like Ansley H. Fox's Patent No. 714,688 granted Dec. 2, 1902, assigned to Philadelphia Arms Co. though PAC didn't use it. I've always suspected that patent wasn't used because it was applied for Jan. 17, 1902, when Ansley was still employed by Winchester Repeating Arms Co. The patent for the Philadelphia Arms Co. locks was done with Ansley's brother, Harry Hunter Fox's name and the PAC ejectors patent was done under the name Max Wirsing, both of Baltimore.

Interesting stuff. The later Bakers, at least in higher grades, often had a Greener type crossbolt.

Robert Liddle from San Francisco ca used the Greener cross bolt also at least on one shotgun he made that I own.

N.R. Davis & Sons c. 1900

http://pic20.picturetrail.com:80/VOL.../413824447.jpg

"Edward George Parry used the "Greener" cross-bolt in his guns. In conjunction with his patented "rear acting" under-bolt on his Quality 2 guns"

The rear acting bolt would seemingly serve to help pin the barrels to the breech, a plausible feature. The Baker has cams in the lump and frame to push the barrels back also.
I like the idea in theory of the barrel extension bolting systems as they seem to have the possibility of pinning the barrels to the breech, establishing a true lock. I.e. the Greener, Brown, and Tobin bolting systems.

Interesting information in the 3rd FAQ in the "Design and Engineering" section; What is the advantage of the "Treble Wedge Extension Rib" Rotary Lock Bolt?
https://lcsca.clubexpress.com/conten...&club_id=43784