Edward VIII Post Box :Walkford Mystery Cache
Edward VIII Post Box :Walkford
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Difficulty:
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Terrain:
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Size: 
(small)
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This is a puzzle cache and is not hidden at the headline co-ords ,but is within 2 miles.
First a bit of history and info.
Britains roadside Letter Boxes first appeared in 1852.
Since then there have been very many different varieties of three main kinds of box.
Pillar box types first appeared in 1852 (free standing).
Wall box types appeared from 1857 (inserted into walls).
Lamp box types appeared from 1896 (attached to posts or poles of various sorts).
Edward VIII post boxes are rare due to his short reign.
After his reign some boxes had their doors changed to remove the cipher.
This example along Ringwood Road Walkford is still in use and bears the EVIIIR cipher& is one of the many listed structures around the Christchurch area.
The rare Edward VIII cipher is .
Questions
ab =Number of complete Calender months of Edward VIII ‘s reign.
cd =The last two digits of this Walkford location post box number BH 23 ??.
e = If the letter box type is lamp box let e =1. If it is pillar box let e =2. If it is wall box let e =3.
f = Alpha numeric value of 4th letter of the colour this letterbox would be painted if no longer in use but not removed from site .
Formula for final co-ords
N 50 45. afb W 001 42.c(e+2)(d-c)
Cache is a small grey pot.
Additional Hints
(Decrypt)
Pnpur 5sg hc va n ovt sbexrq sve gerr.