This spells out MBT-70 in my omnidirectional alphabet. MBT is an acronym for Main Battle Tank. The 70 stands for the 1970s. MBT-70 was the name of a series of over-ambitious prototype tanks that were developped jointly by the USA and Germany in the 1960s. The project was abandonned in 1971 due to cost overruns and problems with the many new technologies used in the prototype tanks.