Revonoc pliers are 6.5″, unlabeled pliers 7.5″.
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parts 1-5/8″ tapered iron blade cutter for HSB Revonoc wood plane No 2 size
It is marked “HSB & Co” above “REVONOC”. There were REVONOC Number 2 sized planes, apparently made by Stanley, and they used a thicker tapered iron. This iron is probably too thick to function in most Number 2 sized planes.