Vintage P. J. Mieth Mfg. Co. 

No. 29 x 4-3/4" Long

 "Neat-File" Corner Punch

Oblong Slot/Slit Hole (5/64" x 3/16")

Mt. Pleasant N.J.

****

Seems to be a less common version in good overall condition with no owner's marks, rust or pitting. The pivot connection is solid with no play. The punch is likely not as sharp as it once was as a "fold" is created along one edge on the reverse side. Still, a pretty decent piece for the collection.