Richard, I had tried matching up 772FKDA to a NSN, but nothing so suggests it is pretty obsolete.
I see I have EMER WHEELED VEHICLES series
K120 Zephyr
K130 Zodiac
K140 Escort
K150 Granada
K190 Cortina
These range from 1962-79. The trouble is, as you can imagine, not an EMER I would consult very often. So I can't find it! I have no IPCs, just a case of wading through to spot something familiar. Any ideas of the most likely candidate?