point the turrets were salvaged and installed onto surplus hulls of M42 Duster anti-aircraft vehicles to produce Type 64 light tanks. The Greek Army received 127 M18s from 1952–1954. Initially, these were organized in three Tank Destroyer Regiments numbered 397, 398 and 399. In 1959 the Tank Destroyer Regiments were reorganized in three Tank Destroyer Battalions with the same numbers. Most of the M18s were retired by the end of the 1960s, but a few remained in service until the mid-1970s for training. The hulls of the M18s were dismantled and the turrets were used as gun emplacements on the northern borders of Greece and the Aegean islands. One M18 is preserved in the Greek Army Tank Museum. Iran received 55 M18s in the 1950s. The Venezuelan military operated M18s beginning in 1954, when they purchased 40. They were refurbished in 1983–1984, and at least one was heavily modernized by a Yugoslavian firm in the 1990s, but it is unclear if more conversions took place. M18 Hellcat "Amaz N Grace" is on loan to the Museum of American Armor in Old Bethpage, New York, from the US Military Museum. An M18 is on display at the Army Heritage and Education Center in Carlisle, Pennsylvania. Variants The only M18 variant produced in significant numbers was the Armored Utility Vehicle M39, a turretless variation used as a gun tractor or command and reconnaissance vehicle. In March 1944, the Ordnance Department authorized the construction of two prototypes; the T41 was a prime mover for the 3-inch Gun M5, while the T41E1 was a command and reconnaissance vehicle that could also be easily converted into a prime mover. The T41E1 configuration was found superior and development of the T41 version was cancelled, although subsequently, the prime mover version of the T41E1 was referred to as the T41, and the command and reconnaissance vehicle as its original designation of T41E1. 640 of the early production M18s that had been returned to the Buick factory for modification were converted into the T41 prime mover configuration between October 1944 and March 1945 by removing the turret and fitting seats for up to eight men in the open fighting space. This version was armed with a single M2 machine gun on a flexible mount. In November 1944, it was standardized as the M39. At the request of the European Theater in early 1945, ten more of the Hellcats