Christy's Cox Comb, yellow rubber lined type, green rim.
Looks the same as South Wales, West Mercia but! dosen't have the large roses on the sides of the band just the small standard roses and plain rivet to front.
Inside marked in pen, INSP CZ11BA
Any help would be appreciated as it dosen't have a badge fitted, you can see the outline of the star and its a single hole.