My understanding is that the normal RAE officer/WO I nine-flamed 49mm grenade was that worn on officer's mess dress, as did the RAA officers with their 47mm seven-flamed grenade. There was a fair amount of space on the lapels of those mess dress jackets.
Worn centrally on the lapel with the highest point of the badge 7 inches below the junction of the collar and the forward edge of the shoulder strap [Dress Manual 1963].
Keith
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