Vester was a brandname used by the Samuel Music Company (Midco International) of Effingham, Illinois for their range of Korean made guitars.
The Vester brand started in 1990 following the super strat boom of the late 1980s. 

Vester instruments were originally made by Saehan Guitar Technology, a subdivision of Zaozhuang Saehan Music Co., Ltd in South Korea (now known as Sunghan Music). The brand grew to embrace a range of Japanese and Korean made acoustics, electrics and amplifiers.

Although initially successful, Midco abandoned the Vester trademark in 1994. The Fender Corporation began preparing a litigatory action against Midco / Samuel Music in 1994, for allegedly choosing the Vester brand as a "sound-alike" for Fender, also claiming similarity between the typefaces used on the headstocks. Faced with the lawsuit, Midco ditched the Vester brand and concentrated on their other brands (like Lotus).