A stamboek is a military service register.
Outside genealogy, the word stamboek is also used for a studbook, a register of the pedigree of purebred animals. This usage has led several genealogy websites, including Ancestry, to mistranslate the stamboek military records as “studbooks.”

Stamboek with entry for Adriaan Marijnissen in the 3rd Infantry Regiment, 1855-1860.
Call no. 852, Military Service records of Petty Officers and Enlisted Men, Record group 2.13.09, Nationaal Archief, The Hague; finding aid and images, Nationaal Archief
(https://www.nationaalarchief.nl/onderzoeken/archief/2.13.09/invnr/852/ : accessed 22 December 2023).