H.A - Atkin Bros -Harry Atkin The shape of the cartouche around City Mark and Standard Mark generally change to match the shield around the Date Letter Mark.
Tardy's Hallmarks on Silver, in English, can help decipher most of these marks, and help with understanding the book on gold and platinum marks, which has not been translated from the French.
Most hallmarks books indicate an upright anchor for silver and a sideways anchor for gold, (Birmingham assay office) but this was not strictly adhered to.
