mon express

[fozzys123]

29d -e-g-e space on the reverse of a coin or medal below the central design often displaying secondary details such as the date of minting many thanks

[bulliver]

exergue

http://www.thefreedictionary.com/exergue

[factor-fiction]

That's a new word for me, bulliver

[bulliver]

and me...

[fozzys123]

and a new word for me,many thanks.

[factor-fiction]

I wouldn't have got it using the crossword solver either as lozzy has shown only 6 letters