GAMI was an Italian manufacturing company from the 1970s, which was integrated with Pietta in 1978. This stamp is found on Pietta revolvers proofed in 1971 (XX7) and 1978 (AD) only in Europe. To date, no US imported Pietta revolvers were marked as such. The stamp is the four letters in a flat diamond very similar to the Pietta diamond stamped FAP logo. The parts of these two makers are more or less compatible, most likely because Pietta contracted with GAMI for parts prior to Pietta going to CNC machining in the late 1980's and fully in 2002.