Pre-tied style, with old-fashioned buckle fastening.
2 clips on the back, to hold it in place.
No garment composition label, but it appears to be silk.
Difficult to date exactly, but probably 1920s/1930s or thereabouts.
The size of the bow is 4 1/4 inches (10.5 cm) long by 2 1/4 inches (5.5 cm) tall.
Size and custom fitting
This bow tie will fit all collar sizes from 14 to 18 inches.