Pixie Key

This is a case for a pixie radio. It also has room for 8 AAA batteries.
It features a built in keyer.

Other features include....
roller skate bearing.
rifle shell contacts.
only one visible wire!
a single pen spring.
handy so-239 connector

You will probably need to tinker with the model for your specific needs... https://www.tinkercad.com/things/jLGg1Zdm9oD