Obsolete NEC 1-inch open reel format

[RJMiranda]

Has someone heard about the NEC TT-series videotape recorders?

In the second half of the 1970s, Cuban TV re-started color broadcasts. (In the late 1950s there had been color broadcasts at Havana, using film materials and a lone camera for the presenter.)

The equipment used in the 70s was a lone NEC OB-van with four cameras. As it was the ONLY color camera chain, it was used either for OB-service, or parked alongside the TV building, with the camera cables running up the stairs towards the studios.

Originally it was equipped with two TT-1000 one-inch open reel VTRs. Later some more machines were bought, including TT-3000s that could accommodate bigger reels.

All of this is mainly hearsay, because I was a teenager. But a few years later I had the chance to visit the NEC OB-van, which at that time was already using BVU-200 Umatics.

In the early 90s I had a glimpse of one TT-series machine (not working) in one of the editing suites at the Cuban TV building.

I understand that a lot of 1-inch tapes are still sitting at the Cuban TV archives because there is no machine to play them. About a decade of history must be decaying inside these tapes.

I haven't been able to find any mention to these NEC one-inch machines on the Internet. Does somebody have some info on the format, and/or the availability of working machines?