How old is this book, then?

[ChemicalChaos]

Every single book I've come across in my life has had a date of publication printed somewhere on the pages between the front cover and the start of the text. All except one:

A rather old copy of Tom Brown's Schooldays, handed down through the family to me years ago. I have looked through every page both before and after the story many times, but have yet to find any identifying mark of age. There are the usual logos of the publishers, but no date of publication or reprinting.
I find it most odd, and I wonder - can anyone identify (even approximately) the year of this book please?

[ChemicalChaos]

Thanks for all the info, the knowledge base of PH never fails to astound me

Interesting to hear it should have a dust jacket - its never had one for as long as I've seen it and the thought never crossed my mind. The value is to be expected I suppose for what is presumably a much- printed book, mind you as a family hand me down it's unlikely it would ever be sold.

I suppose I should actually get round to reading it at some point! I got to chapter 3 when I was in primary school, but gave up as it was a bit heavy going for someone more used to Reading Tree books...