Mass arms bullet mold

Hi: new to site

I have came across a Mass. arms co bullet mold. It is for round ball and a conical bullets and measures about .405. It is made of brass. My limited research leads me to believe it was made for the wesson & Leavitt paton revolver which was made by Mass armes co in 1850 & 51. when colt sued them for paton infringement the production stopped.

If anyone out there has any additional info I would like your input.


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