The directory for 1863 has an advertisement for Henry Platts, as a manufacturer of ‘superior’ table cutlery, shoe, butchers’, palette, and putty-knives.  He was based at Excelsior Works in Suffolk Street and lived in Birkendale View, Upperthorpe.  He appears to have launched his business as a cutlery dealer in South Street in 1853, before moving to Suffolk Street in the early 1860s.  In 1861, he employed a dozen men and one boy. 

By the 1870s, the business had moved to Stand Cutlery Works in Corporation Street.  In 1884, Henry Platts was listed as a table cutlery manufacturer at Marsden Wheel, Love Street; then in Bridge Street in the early 1890s.  However, Henry Platts, late of Burngreave Road, died on 27 November 1893 in Wadsley Asylum, aged 75.  He was buried in St Mary’s graveyard, Walkley.  His daughter, Margaret Ann Squires, continued to trade for a time until her own death in 1895.  Platts’ trade mark was the word ‘CLIMAX’, above his own name.  The mark passed to Charles Heald and was later held by Thomas Ellin.