A Zemun Factory
INSA was established in 1950 in Zemun, near Belgrade, originally under the name Fabrika Satova. The company adopted the INSA name in 1954.
INSA Models & Variants
First Generation
The earliest chess clocks used heavy wooden or oak-type cases and an integrated oscillating bar. Examples from roughly 1950–1954 generally lacked the later INSA dial logo.
INSA - Yugoslavia’s Take on the Chess Clock
A Recognizable National Product
From 1954 into the early 1960s, INSA branding appeared on the faces. Later production moved through plastic cases and newer wooden analog forms while retaining the familiar two-player mechanical architecture.
Tournament Association and Continuity
INSA clocks are associated with the 1990 Novi Sad Chess Olympiad, and the company continues to exist in Zemun, Serbia, with chess clocks still represented among its products.
Historical Significance
Unlike countries with many small makers, Yugoslavia's surviving story is overwhelmingly INSA-centered. One industrial enterprise supplied the recognizable national clock tradition across several generations.