Well, between you and me there are at least two of those things out here now.
Same model number and everything.
Grandson got bored last Winter, sorted out one old storage box and recovered the case for me. I'd thought I'd lost it and just carried the 'rule around naked in my briefcase for years, only used it during power outages or when we didn't have time to run to the office to get a couple numbers for the shop.
One foreman kept a box of chalk and a little cheap 'rule for me in his "office". Claimed that he and I could do better design work in chalk on the floor than some places with hundred-man engineering departments.
Don't know if I'd go that far but I know we could straighten up a screwed-up design PDQ.
There's at least three of them [& us] us out here.
Not sure if 4081-3 is a model # or a production lot #.
I still have my small [6"], plastic, pocket one, with eight scales [# 4161-1].
Its case might be just the right size for HLB's snake.
We might have been classmates!
Most of the students used their essential K&E slide rules often, usually during exams.
For the difficult & feared Thermodynamics final exam — which was held in an auditorium, with the entire sophomore class seated — one fraternity pulled a Psyop.
Many of the semester's classes required learning & using Steam Tables to calculate results.
The Tables were printed on a very large sheet of paper, covered with matrices of functions & data, to calculate results, given certain variables.
Everyone brought his sheet of Tables — folded up tightly — to the exam.
About 20 minutes into the exam, one fraternity's brothers — plus a few friendly shills as camouflage — started pulling out their respective sheets, & unfolding them awkwardly over their small seating areas.
This freaked out the other students. Most of them unfolded their own tables, following the lead of a few smart guys.
But — as a surprise to some — the Tables were not needed to solve a single problem on the exam.
This helped distort the grading curve in the conspirators' favor.
Glad I graduated, & got out of there alive.