While the "state" uniforms (red) retained the "Tudor Crown" the daily blue "undress" uniforms changed to the "St.Edward's Crown" at some point (late 1950's/1960's).
Photo shows the "Tudor Crown" version being worn in August 1955.(Mormon Tabernacle Choir tour Europe in 1955)
EDIT - Found this :
Quote:
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Blue and red undress uniform, with royal crown and monogram of Queen Elizabeth, introduced in 1958 and worn as the Yeoman Warders' normal working dress. Hobson & Sons, London.
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