Marsh #5C Jack
H.C. Marsh Tool Co. of Rockford Ill. 1915-1924. The Marsh planes may have MARSH cast into the bed and the letter M precedes the number, i.e. M2, M3, M5 1/2, etc. The irons are stamped with the Marsh name and also with the width of the cutters.
(My #M-082220-1)
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