Vintage Van Heusen detachable shirt collar. You will need a pair of collar studs to fix this collar to your tunic shirt.
Patent semi-stiff collar, made in England, in the mid 20th-century. 
White cotton.

Size  16"
Style number 52

You will need a pair of collar studs to attach the collar to your shirt.
These studs are available separately from my other eBay listings.

Condition:
Used collar, in good condition.  Has been freshly laundered but not starched.