Shaw-Walker. Flexowriter File-Desks. Accessed March 24, 2023. http://archive.org/details/TNM_Flexowriter_File-Desks_-_Shaw-Walker_20171021_0001.

An interesting in-desk filing system for punched cards. Interesting I've not seen anything like this prior for a mini card index maintained in an office desk drawer.

Perhaps such a system wouldn't have been as easily accessible for use on a daily basis versus potentially more portable small systems that could have been transferred from desk to desk (person to person).