Anyone heard of Tech Instruments Corporation?

I just shelled out 600 for an OTL purportedly a Futterman H3. I've found the chronology of licensing history but this outfit is not mentioned anywhere. The underside of the transformer has a couple of notes dated 1967 and 1978 with the initials J.F. It looks to be in decent shape so I figure worth the effort. I'd just like to verify it's identity.