Decus et tutamen is the edge inscription around some one pound coins. Translated from Latin, it means “an ornament and a safeguard”. The one pound coin has been in circulation since 1983 and there are an estimated 1.4 billion pound coins in circulation.

This was a macro photo taken with my 105mm lens, at, er, f/51. Sadly I only have the on-camera flash, so it’s a bit lame. Here’s a 100% crop of part of the photo:

I believe that some pre decimal coins also had latin inscriptions along the coin edge;that show the words Venus,Jupiter & Neptune….is this true?
If true which denomination of coins had these inscriptions?
Any information gratefully received
How much is this coin worth?