Vintage detachable "Burlington number 7" shirt collar by Mastocraft.
This is a day collar, for business or casual wear.
Probably made around the 1970s/1980s.
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 (the stud in the picture is just for display).
Collar size: 15 1/2 inches (to fit shirt size 15").
Vintage collar, clean, starched and in very good condition.
Previous owner's laundry mark on inside of collar.