Pair of Australian Shoulder Boards - Brigadier -- possibly Royal Marines

Description

I sent a photo of these shoulder boards to a friend in Perth and while he could tell they were of Brigadier rank, he said he suspected (but was not positive) they belonged to the Royal Marines.
If anyone can identify them better, please send me a note that I can attach to this item.
I was trading Mess Dress military uniforms with a gentleman from Adelaide and this came to me as part of the deal (about seven years ago, actually).