Which Battalion?
 

42nd Bn OCA, silver medallion engraved to the reverse C.V.Taylor 1947.
Which 42nd Battalion?

I wonder if “42nd Battalion” OCA refers to old comrades of the 1st Bn BW, and then a 73rd Battalion might have referred to old comrades of the 2nd Bn BW. Some regiments preserved association with their numbered forebears in such ways. I can’t think what else 42nd Battalion might mean as late as 1947.

Maybe not the 42nd Battalion, maybe the 42nd Cup event.

When my father was in the KRRC in WW2 they were still calling themselves the 60th Rifles.

My grandfather, in the late 1960s, was still telling me how he was in the "Dirty Half Hundred" in WW1.

Very possible it’s Australian
Paul

That would fit too.

42 Bn AIF was from Queensland and known as the Australian Black Watch.

What's on the other side.

Reverse is engraved C V Taylor 1947.

It is a long shot, but AIF "Attestation Papers" are available online.

You could try looking to see if there is one for a C V Taylor who served in 42 Bn AIF.