(@3083joe update)
Oh crap, you're right, thanks for the correction! Are you sure Factory Code 5 is Eindhoven, Holland? Some web source data shows it to be Toshiba/ Japan (e.g. http://frank.pocnet.net/other/Philips/PhilipsCodeListAB.pdf).
I'm 99% sure it's Eindhoven. These codes were sometimes reused as time passed.
You can see an early 60s snapshot of the codes at:
Notice the empty spot where the factory code 5 likely was earlier.