Dave it was very considerate for Mr Dyer to point out the Smock for sale on eBay. I am the biggest advocate of the 'so what' crowd as the Smock is in pretty bad shape.
His original post was "Well worn, but can not get any more original than this. What stories it could tell." kind of lead me to believe that this smock could be some wonderful example which, when I opened the eBay link, it was not.
It actually could be more orginal by having some provenance, and some evidence of military use, rips and worn out cuffs are not necessarily indicative of orignality nor potentially interesting stories.
I am sure though, that whoever purchases this garment will be happy with their acquisition.