Most Treasured HP Collectible

[tuxfish]

There are three:
an HP-32E ('78) + HP-41C ('79) given to me in Middle School and accompanying me ever since.
An HP-12C of '86 spurred my interest in the Voyager Series.
Although its front being slightly battered/dented now, it's a reliable little fellow when travelling
that fits well into any shirt pocket and continues to deliver excellent at financial transactions.

Subsequent models - with the exception of the 48SX/G/GX - never reached the same feeling for me

[Eddie W. Shore]

HP 12C: at first I wasn't so crazy about it, but now it's one my favorite calculators of all time. I have a HP 12C Platinum Edition 25th Anniversary Edition that my father used for a time.

HP 42S: my favorite RPN calculator. I use this and the DM42 a lot.

HP 71B: doesn't get as much use as I would like. I won a 71B as a door prize at a HHC conference.

[Erik-M]

My HP41C , I bought it in 1984 for 791,10 dutch guilders after working on a farm cleaning flower bulbs for a month.
Most students do this kind of work in summer to earn something, spent all on it.
One year later I did the same and bought the cardreader, I still have the handwritten bills.
Two years later I bought the battery pack charger quad memory and x functions.
I do most calculations in Matlab and python nowadays but still use this one to check my code.

[PeterP]

For me its my 41CY. Its the machine I lusted after as a teenager, insanely out of my reach back then. I still recall the day I got mine, with integrated 2x memory modules (what a cable mess that is inside...).

It makes me happy to look at and use every single time I do, though these days I have a CL connected with a USB power cable from Diego to all my workstations so I don't worry about batteries and can use any and all modules without a problem.

With the inevitable coffee or water around my every day work I was getting scared to use the CY given it can sell for a few months rent (I sold a few pieces of HP collectibles to pay for my rent in France when getting my MSc in Space Science back in 2012)

I will be forever grateful to the person who sold me their CY. You know who you are, thank you!

Cheers

PeterP

[Klondor36]

My 48G as it was my first intro into HP in the early 90's in Engineering School and my 41CV as it was given to me by my Team Lead at a place I worked at.