Yes maybe it is. I from Viet Nam, I got it from a saler, he has so many old and strange keyboard, I brought an Datalux and Compaq MX118000 from him.
With all the label i saw on the mainboard:
"ORBIT INSTRUMENT CORP 11263
ASSY 68774 REV B SER no 0102"
"11263 ASSY 68772 REV - SER No 0140"
Nuum wrote: I've seen this keyboard in a TV series called "The Last Ship" and have ever since wondered what kind of keyboard it was. Now I know it, thanks! In that series it was used on a destroyer type of ship and had green backlight.
Nice

you'r wellcome. Yup, it has yellow or green led as I saw, whenever I plug it in the Alt button flash then turn off quickly.