Vintage detachable shirt collar. You will need a pair of collar studs to fix this collar to your tunic shirt. These studs are NOT included, but are available separately. 
Vintage Moss Bros collar, unused and in very good condition.  Suitable for daytime use.  Difficult to date, but perhaps 1970s or 1980s?
Moss Bros Style number 7.
You will need a pair of collar studs to fix the collar to your tunic shirt.  The studs are NOT included - the stud in the picture is just for display purposes.

Size: Collar size 15.5 (to fit shirt size 15)

Condition:  These collars are unused.  They have been properly stored, and are in very good condition, with slight age-related yellowing of the starch around the fold line of the collar.