Combro 625 Mk IV.
Hand held chronograph for air rifles. This one works well but is not very pretty, after I shot a bit of the aft ring off with an airgun doing some freehand choronographing (before I became a responsible FAC holder).
Cost new is 50 quid. As per Mr Combro, the cost of the aesthetic repairs to make it more pleasing to the will be 7 quid.
Therefore this one is for sale for 20 quid including P&P.
Can dispatch on Friday, along with pictures if required