Type: Mark
Location: Top jaw
Inscription: "A.FORBES" stamped incuse
Type: Mark
Location: Top jaw, below above mark
Inscription: "CCSPRING & CO/WORCESTER" stamped incuse
Type: Mark
Location: Top jaw, opposite side
Inscription: "A.FORBES" stamped incuse
Type: Mark
Location: Top jaw, opposite side, below above mark
Inscription: "PATENT/APPLIEDFOR" stamped incuse