Fairchild used to make semiconductors in Oz.
It appears that one or more Engineers at the (then) Telecom Australia lab were alumni of that company.
At least, they seemed to delight in using devices with obscure Fairchild part numbers.
One of the Tech Officers at the TV site I was at, made up a "magic buggery box" to lock the sound & vision carriers of the old Marconi transmitters accurately--- a requirement when we were converting to PAL colour from BW.
We sent all the details away to the "gurus", who made a nice upgraded version.
Trouble was, it didn't work, & their documentation was a bit lacking.
Poking around, I found a BJT which was definitely faulty.
Unfortunately it was a weird Fairchild number, & no equivalent appeared on the lists we had.
I told the Boss, who grumbled that we "would just have to order it specially".
I was a bit put out by this, & did a bit more circuit tracing.
After finding my way through some convoluted cabling, it became apparent that all the exotic device did was to turn on a LED.
Replacing it with a BC108 or 2N2222 (can't remember which) fixed that, & we found the real fault elsewhere.
Back more on topic, at one time I was continually coming across old Fairchild logic ICs of the 9000 series in various work junk boxes, but never bothered to purloin them, because there seemed to be no use for them.