New Old Stock Stanley Rogers 12" Canadian Slicer Flexible Double Shear Steel Carbon France ~1930s-60s Blade & Handle Marked

Unused vintage Stanley Rogers double shear steel 12" flexible slicer from approximately the 1930's to early 1960's at the latest. These are a very unusual find and represent the best of English cutlery steel and old French knife making, they would be exciting to find in used condition and unused and in this good condition amazing. 

Stanley Rogers (established in 1930 Melbourne Australia) produced knives in their Sheffield workshop and apparently also had them forged, ground and handled in Thiers, France with English double shear steel.

These knives were hand forged on an old Thiers style martinet spring hammer after drop forging, hand ground and hafted in rosewood. This knife has a blade marking and handle foil stamp marking. 

Double shear steel was a 19th and early 20th century steel that was made by case hardening bars of iron in ceramic boxes packed with charcoal, large numbers of these were heated for days on end at high temperatures and the resulting bars were broken up (it would break or shear rather than bend once carbon added hence 'shear' steel) and forged welded into a larger mass. This process was done twice on double shear steel creating a steel with a higher carbon content.