Well i,m going to stick my neck on the block..and agree with Mart...I found a stamp...that,s identical to your J.F SS EP....but,its J.E over SS EP...which is a Birmingham mark..what like Mart posted...nowhere can i find...J.F S S EP...have you never thought that perhaps with all the polishing that cutlery got..that perhaps what you,re seeing now..was,nt always like that...