The 1912 2¢ Washington (#406) was introduced in February 1912 with a perf 12 gauge. In December 1913 the new 10 perforation machines were employed at the Bureau. At some time, presumably 1914, the stamp were fed horizontally through the 12 gauge perforator and then, probably in error, fed vertically through the 10 gauge perforator. No date for this occurrence can be given as none of the surviving examples have a visible date on the postmark, Most are the usual wavy line postmark.

At the time of writing there are 33 stamps recorded, only one of which is not used.

The watermark consists of single lined USPS letters. A stamp may show only part of a letter or letters

#423B was issued with the following plate #

Plate number only
7082