All the AMT/Ertl armor kits are Esci kits. Many of their 1/35 German WW2 armor was top notch as was their German horse drawn supply sets.
Their BMP-1 and BMP-2 were superior to Dragon's BMP-1 and BMP-2. Their T-55 was the best one on the market until Tamiya released the latest one.
Their M1 and M1A1 were bad as are the T-72 and T-74 (a mis-labeled kit). They also did a HMMWV series that was not as good as Italeri's, but at least they included a radio rack. Also the LAV series was not as good as Italeri's, but they were not bad kits.
Esci/AMT/Ertl also did a 1/72 scale armor series that is still highly sought after. These kits are outstanding and Italeri has started to reissue them. Some of the "lost molds" like the 38t, M4A3, M13/40 are extremely hot items to find.
Revell of Germany has also reboxed one of Esci's best kits, the M60A3TTS. This is the 1/35 scale kit. The Revell of Germany 1/72 scale M60A3 kit is not the old Esci one.