Vintage detachable wing collar, Chairman style, sold by Rickards, Old Millgate, Manchester. Probably early 20th century (Edwardian or shortly afterwards). Depth 1.75". 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 pictures is just for display).
Size: Collar size 15.25 (to fit shirt size 14.75).
Condition: Vintage collar, around a century old, but in superb condition.