ITAM was a small British manufacturer of tape machines. It seems they basically invented the 1/2" 8-track and 1" 16-track format, having the former in 1973 a year before TEAC. I don't know if they survived into the 1980s. The machines are rare although they turn up on ebay in the UK from time to time. I'd quite like one of the 8-tracks as a collector's item, but to be honest I'd be kind of scared to actually use it.
I believe My Name has one of these, but he hasn't yet been able to revive it.
Oh, and it seems the guy who designed them went on to found StudioSpares in 1983.