Thank you Mhmorningstar to show this both interesting looking knife and annoying set of gothic style maker’s marks. Is this a butter knife? Do the serrations go all the way along the edge of the blade and was this type of knife typical of any particular time period?
Trev suggests a “marriage” of an earlier blade and later handle with the probable blade maker of Roberts and Briggs. We do know however that in 1863 that firm morphed into Roberts and Belk and how convenient for them to have the same initials to start the surnames. I have an image below.
We know this is Roberts and Belk because of less gothic lettering to confuse and the immediately recognised “oil lamp” trademark. Now, did they start using that oil lamp mark in 1864 and did they put the mark on every item they made? I am offering this thought as 1 other possibility about your knife but I have another more twisted idea. Is your close up of the marks the correct way up? Are the serrations on the top or bottom edge of the blade. I still can not read the writing but now the “star” figural mark looks more like the “cats” face in a London silver hallmark and we do know that pseudo hallmarks were often used by electroplate manufacturers.