This EF Johnson Viking KW Matchbox Antenna Tuner, is in Good Condition.
It is very clean overall with some marks and scratches from use over the years.
With a flashlight I can see all the components inside are intact and in great shape. The back and decal, looks nice as well with no extra holes. The back panel has a rub mark in the finish.
I have not tested this tuner and have not taken the cabinet apart.
This EF Johnson Kilowatt Matchbox Antenna tuner is touted to be one of the best Antenna tuners ever built and is especially designed for open line type feed line and can also be used with coax feedline.
I will provide a reproduction of the manual for the KW Matchbox.