Recently a time traveller from the 70's has landed on my bench.
A Kontron 6001 counter/timer made from 100% TTL and capable of up to 100 MHz.
It had been sent into hibernation due to a tantalum bead that shorted its power supply.
Although it is working again now, I cannot figure out all the functions available, so a manual would be quite handy.
The internet has not washed up anything useful so far and I know the search is going to be cumbersome, but hope dies at last...