Only had brief skim through but essentially seem to be a meld of original set with parts of the 'Modern' (at least they were then !) set covering 1950-1985 along with some other ideas from author (Bill Farquhar which I believe is a pseudonym) with revised armour classes.
Spotting is now deterministic rather than old set ranges but to hit system and converting hits to kills seems similar, though I do see mention of pure Suppression fire (hit points and area based) that I do not recall from early set.
For example the sequence of play now resembles the modern set
No QRS included (boo) but one is available from the Facebook group (https://www.facebook.com/groups/949803497279917/) as is link to Lulu print (rules £9.99 plus P&P)
Will have to give them a good read through and a playtest at some point as nostalgic connection to original set.
