I am hoping that someone can help me with deciphering my Grandfathers Record of Service. According to his RoS he was posted to what looks like Div Amm Coy and has a 54 above it. I have tried searching for this unit but I cannot find anything anywhere. Does anyone recognise this or have any idea what I could be misreading. He was also posted to somewhere that contained 534 in the unit name. I cannot find anything anywhere that could give me any information and I am stuck as to where to look. I would appreciate any help that someone may be able to give me.