If it was published that early it would only cover 80/107 inch S1's.
No the early versions will only cover 80" models!
If this is a proper early one which it sounds like it will actully only cover the 1.6 litre versions. Remember these books were made for dealers/mecanics to service/repair landys, not home mecanics to work on old models. Thats why they are so good but expect you to have all the specal tools avalable.
It will be worth money to someone but finding that persion is another matter. eBay could be a good place, maybe kep an eye on there to see if something simular come up and for how much.
The easy way to spot a non prerod series 1 workshop/instruction/parts book is wether it has 'Series 1' written on it. The originals didn't as there was no series 2 to confuse it with. The final aditions were first published in about 1960 and carry the series 1 name. Age will depend on how they are bound as I have a copy that must be from the 60's and a moddern copy which are both the same, plus a proper 1957 model workshop manual, the latter doesn't refer to series 1's or feature info on the diesel version. Its probubly woth something as its in good nick. The 60's version would also be worth more than a modern one I'd have thought but mine is in very poor condition (damp damage, bindings failing and alot of oily prints) and hence is probubly only worth anything to me as I have the vehicle it was used with and the greasy fingerprints and written notes document its maintinace years ago.