Hi-Mound HK-703 Straight Morse Key
Heres a nice example of the model HK-703 which is a version of the Straight Bar.
Its chrome plated and has the standard mushroom style finger knob.
The base for this model is the heavy high metal type.
Comes complete with the clear cover.
Although used its in very good clean condition.
The base has the remains of a label on it.