Looking at the DoB data for PILLBOX: S0007321 it struck me that the description didn't match the location. As I was in the area and in walking distance of the area described I went for a stroll.
PILLBOX: S0006015 would match the description given for 7321
It has been sealed internally as well as externally.
Missed out one (PILLBOX: S0006014) on my walk as it was surrounded by cows .......
......but did take a couple of shots of PILLBOX: S0006015
http://photobucket.com/dovestop
Plenty more to be photographed along the Dove
(appologies for large photos but I already reduce them to half-original on photobucket)