TX-10 XM-10 Lacrosse

The caption reads, below the dimensions:
"The TX-10 is a prototype solid propellant rocket motor for the US Army's surface-to-surface Lacrosse missile that was designed for use against tanks and bunkers. The motor was manufactured in the 1950s and had a 100-percent flight reliability record."
ATK (formerly Morton-Thiokol) outdoor display in northern Utah, USA. This was a major rocket development facility during the Cold War and beyond.