Ricoh Aficio 551 Copy Reference Manual page 159

Multi 2 Sided
Copies each two-page spread original as it is onto both sides of a sheet.
1 2
3
Note
See the following table when you select original and copy paper sizes with
100% ratio:
Metric version
Original
A3L
B4L
A4L
Inch version
Original
11" 17"L
1
8 / " 11"L
2
A
Press the [Duplex/Combine] key.
1 2
3
Copy paper
A4 (2-sided)
B5 (2-sided)
A5 (2-sided)
Copy paper
1
8 /
1
5 /
" 11" (2-sided)
2
1
" 8 / " (2-sided)
2 2
Series/Book
2
143