Mnemosyne's N177A pad is a double perforated mini notepad. The first perforation is in the usual place at the top, for easy removal, the second perforated line is located halfway down the page. When you don't need the extra perforations, just ignore it.
A full-scale grid that allows you to write pictures and letters.
The micro-perforated design allows you to tear off the page neatly.
Black card sheet front cover and thick card rear.
At the top of each page, there is space for a title and date/reference number.