UPDATE:  Thanks to Dave, we have some additional Koenig history: 

“The son of the founder built the company up into a successful business making winches, “truck bodies”, and other stuff. His name was Herbert Koenig and he died in 2011 at age 95. An obit mentions that Koenig Iron Works (of Houston) was sold in 1978, and is now known as “RKI” and makes truck equipment (in Houston). They are RKI-US.com. Nothing indicates they care about Jeeps anymore!

Also, a Danish guy seems to have a website named Koenigwinches.com and it seems he makes parts for Koenig winches.”

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Original Post November 2019: 

This is a good example of simple post that spun out of control. Initially, I wanted to look at some changes in Koenig’s CJ-5 hardtop model numbers over the years; But, that then expanded to a look at twenty years (or so) of brochures.

THE EARLY YEARS:

The timeline of the early Koenig brochures are pretty easy to identify based on the jeeps used. In later years, Koenig began using numbered ‘bulletins’ to identify brochures. At first, I thought the numbered bulletins should be ordered by ascending number, but after closer examination, I the later two digits of each bulletin number reflect the year of the brochure. As you will see, other brochure elements back this theory.

Before we start, you can find installation instructions for some Koenig hardtops here.

The earliest Koenig brochure I can find was published in an early Willys-Overland Equipment brochure (1949?). The models consisted of “Full Cab” and “Half Cab”. This brochure was included among a surprisingly large number of hardtop competitors’ brochures, including Worman tops, CarsonCraft tops, Boston Top tops, Sturdee tops, Porter & Reed tops, Body V7 Works tops, Blue Star tops, Lambert tops, Hills Custom Built tops and Meyers tops (which became sears tops and a company that was different from the one that produced later Meyer tops).

This brochure circa 1949 showed half and full cabs on a CJ-3A:

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