The Avec is the Original split in half: the same page a day, issued as two books, January to June and July to December. Each volume is 8 mm thick against the single book's 15, so what you carry is half a year rather than a whole one, and the half you are not using stays at home.
That matters most if you paste into your techo. A book that starts thin has room to grow with tickets, photographs and clippings without becoming unusable by November. The first volume is lime yellow, the second ice blue, and both fit the ordinary Original-size covers.
Features
Japanese edition, January start, Monday start, sold as the two-book set
Two volumes, January to June in lime yellow and July to December in ice blue
Each book 148 x 105 x 8 mm (5.8 x 4.1 x 0.3 in) and about 110 g, roughly half the single book
The same daily page as the standard Original, with minor differences in the calendar span and back pages
A 3.7 mm grid throughout, fine enough for prose and square enough to draw on
Thread-stitched binding that opens flat to 180 degrees and stays there, with no holding down
Tomoe River paper, thin and light but resistant to feathering and bleed with fountain pen ink
