Antique Silver Ladle Buxton & Russell Sheffield England 1844 Brittanica Plate

This is an antique silver ladle serving spoon. The silver marks are B & R SBP with a date letter of a block A. Based on my research and others looking, we concluded that this is from Buxton & Russell out of Sheffield, England and that specific A is the letter for 1844. The BP is for Brittanica Plate. Sheffield Marks can be found here - https://www.925-1000.com/dlc_sheffield.html and https://www.925-1000.com/dlc_sheffield.html