Armoured breast plate ID please

[A Senefelder]

Ken, at this period armour of munitions quality like this were being produced in large quantities so the stamp at the neck line is as likely to be an armoury control mark as any sort of makers mark. As for cleaning it, that of course is your call but I left things as they were baring aggressive active rust on armour. If it was varninshed I left the varnish in place.