Under the board, part of a letter or charter written in Latin is visible. According to a possessor's note on the title page, the volume was purchased in 1481 by Iohannes Constenzer?, canon in Waltkirch for II Florins.

Host Volume Information:
Author: Otto < IV> [1452-1491]
Title: Breviarium Constantiense / hrsg. im Auftrag von Bischof Otto IV. von Sonnenberg
Imprint: [Basel] : [Michael Wenssler], [vor 21. Mai 1480]
Extent: 6 Teile ; 31 cm (2°)
(Copinger 1270 = 1272; GW 5318.)