Roland, sorry you’ve missed it, but I have attempted to explain this in multiple threads
Robeson pattern numbers should always, I said, “ALWAYS”, be thought of as having six digits.
Oft times, but not always, knives having a handle die shape pattern number, that being the last three digits, 001 through 099, might have that first zero omitted, either because the tang was small or the guy cutting a new die just didn’t see the need or whatever.
Thus, a 622001 can be found marked 62201 or a 626099 might be found marked 62699.
I, myself, always, in my mind or in conversation, automatically recreate the six digit number, regardless of how it’s stamped.
The only Robeson knives without a six digit pattern number were about a half dozen German imports produced in the late 1950’s and early 60’s and those were quite simply an attempt to remain profitably in business.
They had four digit numbers and bear no connection, whatsoever, to Robeson’s traditional pattern numbering system.
Very nice premium quality Robeson gentleman’s knife, Roger.
I suspect all the blades to be identically marked, as to tang stamp.
And its pattern number is 742079.
DE OPPRESSO LIBER
"...Men may spurn our appeals, reject our message, oppose our arguments, despise our persons ___but they are helpless against our prayers. "