Warrant Officer 2 Subd. Pin-On Collar Rank. To be worn with Warrant Officer BOS. These are not dated, but are vintage Vanguard manufacture (when they used blue cards) and are Vanguard Hallmarked on the reverse. They are also the correct pre-1972 style before the design was changed, so they are perfect for your late 1960's to early 1970's uniforms.