Postby silvermakersmarks » Tue Sep 02, 2014 2:22 am
I agree with you both that the date is 1872. However I also believe that Fred is right in thinking that the sponsor's mark is that of Robert Hennell IV whose company, Robert Hennell & Sons, registered two "RH" marks, one in January 1869 and the other in February 1870.
The Hennell company was started by Robert Hennell [RH] II in 1809. In 1817 it became Robert Hennell & Son when RH III joined his father. RH II retired in 1833 (so Fred's RH cannot be RH II). RH II was joined in the company by his two sons, RH III and James Barclay Hennell and in 1850 the company became Robert Hennell & Sons. RH III died in 1868 and the sons took on the company by themselves using RH IV's mark. RH IV retired in 1877 and the company used the mark "JBH" until 1887 when the company was sold to Holland, Aldwinckle & Slater.
However none of this answers Fred's original question about the mark next to the hallmark. I have no idea...
Phil