knife-cut sewing holes

Source reference: 

Federici and Pascalicchio, A Census... (1993)

Carlo Federici and Francesca Pascalicchio (1993), “A Census of Medieval Bookbindings: Early Examples”, in Ancient and Medieval Book Materials and Techniques: Erice, 18-25 September 1992, edited by Marilena Maniaci and Paola F Munafò, vol. II, Studi e Testi, Città del Vaticano, Biblioteca apostolica vaticana, pp. 201-237.

Additional reference: 
p. 219

Used as preferred label for