I started my project by writing a small number, in pencil, on the back of each card. The numbers are used to keep track of the original drawer in which the card was located, as well as the card's position within that drawer. For example, the card numbered 15-0837 would be the 837th card in Drawer 15.
The numbers which appear in pencil on the verso of Phyllis Diller's index cards were those added by archivist Hanna BredenbeckCorp prior to scanning them for transcription.
https://cathieleblanc.com/2023/02/05/choosing-learning-materials/
Cathie notices that students skip materials about the theoretical "why" of assignments to get to the simpler assignments.
This seems to be an issue with some in the personal knowledge management space who want to jump into the technology, the terminology, and moving things about without always understanding what they're doing or why. Many end up giving up as a result. Few books provide reasoning behind the terminologies or building blocks they describe to provide the theoretical why. As a result some may figure it out from long, fraught practice, but it's likely that more are not seeing the results they expect and thus giving up.
N.B. presuming the 4 1/8" H dimension is even the outer dimension, this means that one can't easily keep tab cut dividers which often go from 4 3/8" to 4 1/2" tall in these boxes with the lids on properly.
Instead, one may prefer their slightly larger microfiche boxes which go up to 4 3/4" which should also presumably fit their microfiche divider guides for sectioning one's work.
Another subtle difference in these two boxes is that the smaller is 60-pt paper versus 40-pt for the larger microfiche box, which means that while sturdy, isn't quite as sturdy.
These should easily fit 4 x 6" index cards as well as card dividers with taller tabs which commercially don't often get taller than 4 1/2".
See also microfiche divider guides.
https://www.reddit.com/r/antinet/comments/vj0blr/decidedly_inessential_share_your_physical_set_up/
An in-depth list of materials someone uses for their zettelkasten.
(Read when there were no comments; potentially useful for revisiting later if there are any.)