In reply to:

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Poster: bonanza
Subject: Re: The 9,3x74R Double Rifle, is it the Holy Grail

Sorry to say, but I'm not familiar with the terms bite, dolls head.

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Bonanza

Here is a picture of a Dolls Head (sort of), a hidden third bite and the hinge pin. Note that the hidden bite is notched to the rear for a sliding bar to engage as is the front lug.