That is what was used on the TRS-80 model 1, 3, 4?
If I remember correctly (it's been about 20 years), it was part number
26-1401? 
        I'd have to pull my Mod III or 4p but I believe there's a
difference between their card edge connector for the parallel printer
port and that of the 1000-series machines.
 Model 2 and 100 used a dual row header, and of course,
the PC clones used
an "RS-232 connector" :-) 
        The dual row header was also used by the Model 2000 and the
Model 102.  Interestingly, they both used the standard DB-25F
connector for the serial port.  Given that Tandy's PC-clones were the
1200, 3000 and 4000 series machines, I would doubt if any of them
used anything other than the standard connector.  It was the original
TRS-80 line, the 2000, and the 1000 series that tended to deviate.
Anyone here have a Tandy 5000MC?  There's a MCA-bus machine you don't
hear much about.
        Jeff
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